Constant-Current, Constant-Voltage Operation of a Dual-Bridge Resonant Converter: Modulation, Design and Experimental Results

Wu, Jiang; Li, Xiaodong; Zhou, Sheng‐Zhi; Hu, Song; Chen, Hao

doi:10.3390/app112412143

Cited by 8 publications

(4 citation statements)

References 26 publications

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“…Therefore, charging strategies have been categorized regarding the control strategy as none-feedbackbased, feedback-based, and intelligent methods [36]. Conventional charge strategies such as CCCV are usually adopted because of the simplicity of the controller where an internal current control loop could provide a robust operation of the power converter [37]. In another classification, charging strategies are regarded as passive and active methods.…”

Section: Charging Strategies Driving Mechanismmentioning

confidence: 99%

$\eta_{max}$-Charging Strategy for Lithium-Ion Batteries in V2G Applications

Beiranvand

Blasuttigh

Pereira

et al. 2022

2022 IEEE Energy Conversion Congress and Exposition (ECCE)

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The design of charging strategies for lithium-ion (Li-ion) batteries depends on the application. In electric vehicle applications, high charging speed and long battery life are essential requirements. However, with the advent of vehicle-togrid (V2G) and potential remuneration for electric grid support, maximum user profit could gain increasing interest through efficient operation that also optimizes battery health. Conventional constant-current constant voltage (CCCV) and constant-power constant-voltage (CPCV) charging strategies do not include the optimum efficiency of the battery and charging stations. In this paper, a charging strategy is introduced aiming at maximizing the instantaneous efficiency (ηmax) of the Li-ion battery and the charging station which minimizes the energy waste. For this purpose, 18650 Li-ion cells and a dual-active-bridge (DAB) converter are considered in the simulations and experimental validations. The results show that the ηmax-charging strategy outperforms conventional CCCV and CPCV charging strategies in terms of efficiency and material-lifetime compatibility.

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Section: Charging Strategies Driving Mechanismmentioning

confidence: 99%

$\eta_{max}$-Charging Strategy for Lithium-Ion Batteries in V2G Applications

Beiranvand

Blasuttigh

Pereira

et al. 2022

2022 IEEE Energy Conversion Congress and Exposition (ECCE)

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“…Among various kinds of power electronics systems, the isolated bidirectional DC-DC converter (IBDC) has gained considerable attention since it can manipulate the power flow magnitude and direction between two DC buses with different voltage levels [3]. The dual-active-bridge (DAB) type of isolated converter is one typical topology of IBDC that is featured with high power density and control simplicity [4,5]. Connected to an LC resonant tank, the dual-bridge series resonant DC-DC converter (DBSRC) is evaluated experimentally in [6].…”

Section: Introductionmentioning

confidence: 99%

Transient Modulation for the Step-Load-Change Process in a Dual-Bridge Series Resonant Converter

Zhou

et al. 2022

Electronics

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A phase-shifted dual-bridge series resonant DC-DC converter (DBSRC) is a competitive candidate for applications of an energy storage system. At the request of a step-load-change command such as the start-up and power-level change, the converter may suffer from large-amplitude transient oscillations due to improper transient modulation. Furthermore, the DC bias current and overshoot current/voltage in the resonant tank and transformer caused by oscillations may result in transformer saturation and poor dynamic performance. To solve these problems, two fast transient modulation (FTM) methods are proposed in this paper. First, based on the steady-state analysis of the converter with phase-shift control, the current and voltage trajectory of the resonant capacitor can be obtained. Then, the detailed principles of two FTM methods are explained for achieving a smooth transition. Through the adjustment of the durations of the adjacent switching intervals temporarily, the transient trajectory can be predicted and is expected to match the destination trajectory within one switching period. Consequently, the proposed FTM methods enable the converter to move from one steady state to another instantly and the step-load-change transition can be an overshoot-free procedure. Finally, both simulation and experimental tests prove that the two modulation methods can effectively eliminate DC bias current and overshoot current/voltage in the DBSRC transient process and obtain a fast transient response.

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“…Due to the features of electrical isolation, bidirectional energy flow, high power density and ability to achieve soft-switching, the dual active bridge DC-DC converters (DAB) and dual bridge resonant converters (DBRC) are widely used in a series of applications such as electric vehicles (EVs) [1,2], smart grids [3], energy storage systems (ESS) [4], and renewable energy systems. To meet the requirements of battery applications, converters should operate with bidirectional power transfer and soft-switching in a wide voltage range [5]. The conventional modulation strategy of a DAB or DBRC is the single phase shift (SPS) modulation [6,7].…”

Section: Introductionmentioning

confidence: 99%

Analysis and Verification of a Half-Dual Bridge Resonant Converter with Voltage Match Modulation

Wang

Sun

et al. 2022

Electronics

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To overcome the weakness of the narrow conversion gain of dual bridge resonant converter, a half-dual bridge resonant converter (H-DBRC) with voltage match modulation (VMM) is proposed and implemented for wide voltage range applications. The H-DBRC, including a full bridge on the primary side and a half bridge on the secondary side, is adopted to realize the bidirectional power flow and wide voltage operation. Owing to the synergy between the H-DBRC structure and VMM strategy, the converter can operate in full-bridge state and half-bridge state with maximized ZVS (zero-voltage switching) operation and minimized circulating current. The steady-state analysis is performed and the solutions for both forward and backward modes could be obtained uniformly by using the fundamental harmonics approximation approach. The soft-switching characteristics, implementation process and design example are analyzed in detail. Finally, to confirm the theoretical analysis and feasibility, both simulation and experimental verifications are demonstrated in this paper. Since the converter consistently achieves voltage-matching operation, the optimal ZVS range can be obtained when the voltage gain M is between 0.5 to 1. Moreover, the economic cost and control complexity are greatly reduced because only six switches are required in the converter.

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Constant-Current, Constant-Voltage Operation of a Dual-Bridge Resonant Converter: Modulation, Design and Experimental Results

Cited by 8 publications

References 26 publications

$\eta_{max}$-Charging Strategy for Lithium-Ion Batteries in V2G Applications

$\eta_{max}$-Charging Strategy for Lithium-Ion Batteries in V2G Applications

Transient Modulation for the Step-Load-Change Process in a Dual-Bridge Series Resonant Converter

Analysis and Verification of a Half-Dual Bridge Resonant Converter with Voltage Match Modulation

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