Bi-directional DC to DC converters for fuel cell systems

Wang, K.; Lin, Chin-Hone; Zhu, Lizhi; Qu, Dayu; Lee, F.C.; Lai, Jih‐Sheng

doi:10.1109/pet.1998.731056

Cited by 156 publications

(71 citation statements)

References 2 publications

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“…In paper [4] first describes the need of a bi-directional DC to DC converter for a fuel cell system. Various combinations of current-fed and voltage-fed converters are explored for the application of different voltage levels.…”

Section: Literature Surveymentioning

confidence: 99%

Implementation of Bidirectional LLC Resonant Converter for RES with Automatic Transition

N¹,

Dhanalakshmi²

2017

International Journal of Innovative Research in Electrical, Ele

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This paper presents the hardware implementation of the bidirectional LLC resonant converter used for renewable energy sources and energy storage systems with automatic mode transition. Out of the various bi-directional DC-DC converters, LLC resonant converters have gained an immense interest due its simple structure, buck/boost operation capability and narrow switching frequency variation range and higher efficiency than other converters. With this proposed new bi-directional LLC resonant dc-dc converter, the power flow direction and output power of the proposed converter can be changed automatically and continuously, which is attractive for energy storage systems to keep the dc-bus voltage constant and to keep the balance of energy. The desired characteristics of the proposed topology will obtained and analyzed. The analysis of the proposed Power flow converters for Distributed Generation with automatic bidirectional Transition will be carried out using MATLAB simulation package and the results will be verified by the construction of prototype model.

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Section: Literature Surveymentioning

confidence: 99%

Implementation of Bidirectional LLC Resonant Converter for RES with Automatic Transition

N¹,

Dhanalakshmi²

2017

International Journal of Innovative Research in Electrical, Ele

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“…It needs to follow the power flow direction to define its output and input positions. The application scope of a bi-directional converter includes electric vehicles, fuel cell systems, renewable energy conversion systems, etc [14][15][16][17][18].…”

Section: B Bi-directional Dc-dc Convertermentioning

confidence: 99%

Improvement of Available Battery Capacity in Electric Vehicles

Liu¹

2013

Journal of Power Electronics

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This paper proposes a new method to improve the available battery capacity in electric vehicles by connecting lead-acid batteries with lithium-ion battery in parallel to supply power. In addition, this method combines the discharge characteristics of batteries to improve their efficiency and lower their cost for electric vehicles. A lithium-ion battery set is used to connect with N sets of lead-acid batteries in parallel. The lead-acid battery supplies the initial power. When the lead-acid battery is discharged by the load current until its output voltage drops to the cut-off voltage, the power management unit controls the lead-acid battery and changes it to discharge continuously with a small current. This discharge can be achieved by connecting the lead-acid battery to a lithium-ion battery in parallel to supply the load power or to discharge its current to another lead-acid or lithium-ion battery. Experimental results demonstrates that the available capacity can be improved by up to 30% of the rated capacity of the lead-acid batteries.

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“…Dual-active-bridge isolated bidirectional DC-DC converters (DAB-IBDCs) based on high frequency transformers are the most common topologies for conventional HVCR BDCs [10][11][12]. HVCR can be achieved by adjusting the transformer turns ratio.…”

Section: Introductionmentioning

confidence: 99%

A Four-Phase High Voltage Conversion Ratio Bidirectional DC-DC Converter for Battery Applications

Xue

Wang

et al. 2015

Energies

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This study presents a four-phase interleaved high voltage conversion ratio bidirectional DC-DC converter circuit based on coupled inductors and switched capacitors, which can eliminate the defects of conventional high voltage conversion ratio bidirectional DC-DC converters in terms of high-voltage/current stress, less efficiency and low-power limitation. Parallel channels are used to reduce current stress at the low-voltage side and series connected switched capacitors are used to enlarge voltage conversion ratio, reduce voltage stress and achieve auto current sharing. This paper proposes the operation principle, feature analysis and optimization design considerations. On this basis the objectives of high voltage conversion ratio, low voltage/current stress, high power density, high efficiency and high-power applications can be achieved. Some experimental results based on a 500 W prototype converter (24 V to 48 V at low-voltage side, 400 V at high-voltage side) are given to verify the theoretical analysis and the effectiveness of the proposed converter.

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Bi-directional DC to DC converters for fuel cell systems

Cited by 156 publications

References 2 publications

Implementation of Bidirectional LLC Resonant Converter for RES with Automatic Transition

Implementation of Bidirectional LLC Resonant Converter for RES with Automatic Transition

Improvement of Available Battery Capacity in Electric Vehicles

A Four-Phase High Voltage Conversion Ratio Bidirectional DC-DC Converter for Battery Applications

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