A Modularization Method for Battery Equalizers Using Multiwinding Transformers

Shang, Yunlong; Xia, Bing; Zhang, Chenghui; Cui, Naxin; Yang, Jufeng; Mi, Chris

doi:10.1109/tvt.2017.2702065

Cited by 62 publications

(28 citation statements)

References 31 publications

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“…120 Table 1 summarizes the advantages and disadvantages of the current balancing topologies and Figure 13 shows a result of comparison. 88,90,121,122 It is worthy to denote that the criterion for classification are based on quoted references and the applicational experience. Therefore, some special design or technical upgrade may differ from this content.…”

Section: Summary Of Equalization Topologymentioning

confidence: 99%

A comprehensive review on inconsistency and equalization technology of lithium‐ion battery for electric vehicles

et al. 2020

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The rapid growth of transportation demand has been enlarged strongly which has promoted electric vehicles powered by lithium-ion batteries. However, the inconsistencies within the battery pack will deteriorate over the lifecycle and affect the performance of electric vehicles. Therefore, various thermal management systems and equalization systems have been applied in battery management system to deal with the inconsistencies, extend battery service life, and improve safety performance. This review summarizes the origination of inconsistency within lithium-ion batteries from production to usage process, and then introduces the classification methods and application scenarios of the balance management system in detail. Based on the circuit topology, equalization systems can be classified into passive and active topologies. Active topologies

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Section: Summary Of Equalization Topologymentioning

confidence: 99%

A comprehensive review on inconsistency and equalization technology of lithium‐ion battery for electric vehicles

et al. 2020

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“…The initial current i Lm0 and duty cycle D vary with load current. Line segments CG, BH, and AI represent the i Lm at a small load current, ideal load current, and large load current, respectively, and the line segments have the same rise rate m. When the current i Lm reaches the line segment BH, the average current of i Lm reaches the maximum value, which can be expressed as (10). When the average discharging current i Lm is the maximum, the discharging power reaches the maximum, and the corresponding average output current can be calculated as (11).…”

Section: Csmentioning

confidence: 99%

“…Furthermore, it is difficult to use in the high voltage SCESS, because the number of windings which share the same core are limited. The modularization technique can be used to make the multi-winding transformer balancing topology suitable for the high voltage energy storage system (ESS) [7,9,10]. These voltage equalizers with a high efficiency and small balancing current between modules are very suitable for the battery energy storage system (BESS).…”

Section: Introductionmentioning

confidence: 99%

A Modularized Discharge-Type Balancing Topology for Series-Connected Super Capacitor String

et al. 2018

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This paper proposed a modularized discharge-type topology for the voltage balance of series-connected super capacitor (SC) string. The proposed topology consists of cascaded converter modules and a boost converter. The cascaded converter modules discharge the higher voltage SCs directly with the ideal output current to realize a fast balancing speed and the boost converter feedbacks the extra energy from the higher voltage SCs to the super capacitor energy storage system (SCESS). The modular design of the cascaded converter modules makes the balancing system suitable for different voltage levels of SCESS. Unlike the charge-type topologies which discharge the higher voltage SCs indirectly, the proposed topology discharges the higher voltage SCs directly with a big current, and the over voltage phenomenon of SCs is then avoided, which means the reliability of the SCESS can be improved. The voltage stress of the switches inside the cascaded converter modules is low, which is different from the existing modularized discharge-type balancing topology. What is more, the control of cascaded converter modules and the boost converter can be implemented by analog devices which will simplify the control of the whole system. The control degree of freedom is high and the voltage of each cell can be controlled. An in-depth comparison analysis with the charge-type balancing topology is performed from the perspective of balancing speed and round-trip energy efficiency. The proposed topology and the balancing performance are confirmed by experimental results.

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“…Shang et al . [16] proposed a modular balancing method based on a multi‐winding transformer. Compared with the former, it reduces the volume and cost, but the module structure is more complex.…”

Section: Introductionmentioning

confidence: 99%

Active balancing method for series battery pack based on flyback converter

Guo

Geng

Liu

et al. 2020

IET Circuits, Devices & Systems

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Lithium battery has become the main power source of new energy vehicles due to its high energy density and low self-discharge rate. In the actual use of the series battery pack, due to the internal resistance and self-discharge rate of batteries and other factors, inconsistencies between the individual cells are unavoidable. Such inconsistencies will reduce the energy utilisation rate and service life of the battery pack, and even endanger the safety of the battery systems. To improve the consistency of the series battery pack, a novel balancing method based on the flyback converter is proposed in this study. The flyback converter with a simple and reliable structure is used to realise the energy transfer between the whole battery pack and any single cell. Compared with the traditional balancing topology, the topology proposed in this study reduces the number of components and the volume of the balancing system, and only needs one set of control signals on the converter primary side, thus reducing the control difficulty. The experimental results show the effectiveness of the novel balancing method. (a) Charging process of converter primary, (b) RCD buffer circuit absorbs the spike voltage, (c) Discharging process of converter secondary inductor

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A Modularization Method for Battery Equalizers Using Multiwinding Transformers

Cited by 62 publications

References 31 publications

A comprehensive review on inconsistency and equalization technology of lithium‐ion battery for electric vehicles

A comprehensive review on inconsistency and equalization technology of lithium‐ion battery for electric vehicles

A Modularized Discharge-Type Balancing Topology for Series-Connected Super Capacitor String

Active balancing method for series battery pack based on flyback converter

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