Two-Mode Balancing Control Scheme for Modular DC/DC Converter Interfaced Battery Swapping Stations
IEEE Transactions on Transportation Electrification, vol. 11, pp. 1640–1651
Abstract
In comparison to the traditional structure, the utilization of the modular dc/dc converter (MDDC) for integrating power battery packs in electric vehicle battery swapping stations (BSS) presents notable advancements in cost-effectiveness, conversion efficiency, and stability. This paper introduces a two-mode balancing control scheme tailored for the state-of-charge (SOC) differences due to the distinctive plug-and-play operation of BSS. Firstly, the proposed scheme efficiently addresses high swapping demands by expediting the generation of full battery packs using a sorting selection control during the on-grid mode. Subsequently, during the off-grid mode, a flexible energy transfer loop, incorporating the dc inductor, capacitor, and submodules, enhances balancing capabilities through an internal circulation control. It can effectively address scenarios with low swapping demands where there is a shortage of battery packs that are not fully charged. Moreover, the proposed method ensures equal switching loss distribution and accelerates balancing speed, adding to its appeal. Practical validation of the proposed scheme is achieved through a 1kW/1kWh MDDC-BSS prototype equipped with 16 submodules.
Authors 8
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Zhan Ma Aachen Institute for Power Electronics and Electrical Drives (ISEA) Chair for Electrochemical Energy Conversion and Storage Systems
Shandong University · RWTH Aachen University
Affiliation as printed
Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education, Shandong University, Jinan, China
Institute for Power Electronics and Electrical Drives (ISEA), Chair for Electrochemical Energy Conversion and Storage Systems, RWTH Aachen University, Aachen, Germany
Key Lab of Power System Intelligent Dispatch and Control of Ministry of Education, Shandong University, Jinan, China
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Affiliation as printed
School of Control Science and Engineering, Shandong University, Jinan, China
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Affiliation as printed
Southchip Semiconductor Technology (Shanghai) Company Ltd., Shanghai, China
Southchip Semiconductor Technology (Shanghai) Co., Ltd, Shanghai, China
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David Wasylowski Aachen Chair for Electrochemical Energy Conversion and Storage Systems Institute for Power Electronics and Electrical Drives (ISEA)
Affiliation as printed
Chair for Electrochemical Energy Conversion and Storage Systems, Institute for Power Electronics and Electrical Drives (ISEA), RWTH Aachen University, Aachen, Germany
Institute for Power Electronics and Electrical Drives (ISEA), Chair for Electrochemical Energy Conversion and Storage Systems, RWTH Aachen University, Aachen, Germany
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Affiliation as printed
Department of Electrical Engineering, Tsinghua University, Beijing, China
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Affiliation as printed
Yangzhou Huading Electric Company Ltd., Yangzhou, China
Yangzhou Huading Electric Co., Ltd, Yangzhou, China
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Affiliation as printed
Yangzhou Huading Electric Company Ltd., Yangzhou, China
Yangzhou Huading Electric Co., Ltd, Yangzhou, China
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Dirk Uwe Sauer Aachen Chair for Electrochemical Energy Conversion and Storage Systems Institute for Power Electronics and Electrical Drives (ISEA)
Affiliation as printed
Chair for Electrochemical Energy Conversion and Storage Systems, Institute for Power Electronics and Electrical Drives (ISEA), RWTH Aachen University, Aachen, Germany
Institute for Power Electronics and Electrical Drives (ISEA), Chair for Electrochemical Energy Conversion and Storage Systems, RWTH Aachen University, Aachen, Germany
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