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A Unified Model for Active Battery Equalization Systems

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Název: A Unified Model for Active Battery Equalization Systems
Autoři: Ouyang, Quan, 1991, Ghaeminezhad, Nourallah, Li, Yang, 1984, Wik, Torsten, 1968, Zou, Changfu, 1987
Zdroj: Användarbeteende informerad inlärning och intelligent kontroll för laddning av fordonsbatterier IEEE Transactions on Control Systems Technology. 33(2):685-699
Témata: Equalizers, equalization time estimation, Batteries, Mathematical models, hypergraph, unified model, Active battery equalization, Vectors, State of charge, Hardware, Switches, Integrated circuit modeling, Controllability, Analytical models
Popis: Lithium-ion battery packs demand effective active equalization systems to enhance their usable capacity and lifetime. Despite numerous topologies and control schemes proposed in the literature, conducting quantitative analyses, comprehensive comparisons, and systematic optimization of their performance remains challenging due to the absence of a unified mathematical model at the pack level. To address this gap, we introduce a novel, hypergraph-based approach to establish the first unified model for various active battery equalization systems. This model reveals the intrinsic relationship between battery cells and equalizers by representing them as the vertices and hyperedges of hypergraphs, respectively. With the developed model, we identify the necessary conditions for all equalization systems to achieve balance through controllability analysis, offering valuable insights for selecting the number of equalizers. Moreover, we prove that the battery equalization time is inversely correlated with the second smallest eigenvalue of the hypergraph's Laplacian matrix of each equalization system. This significantly simplifies the selection and optimized design of equalization systems, obviating the need for extensive experiments or simulations to derive the equalization time. Illustrative results demonstrate the efficiency of the proposed model and validate our findings.
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Přístupová URL adresa: https://research.chalmers.se/publication/544008
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: A Unified Model for Active Battery Equalization Systems
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Ouyang%2C+Quan%22">Ouyang, Quan</searchLink>, 1991<br /><searchLink fieldCode="AR" term="%22Ghaeminezhad%2C+Nourallah%22">Ghaeminezhad, Nourallah</searchLink><br /><searchLink fieldCode="AR" term="%22Li%2C+Yang%22">Li, Yang</searchLink>, 1984<br /><searchLink fieldCode="AR" term="%22Wik%2C+Torsten%22">Wik, Torsten</searchLink>, 1968<br /><searchLink fieldCode="AR" term="%22Zou%2C+Changfu%22">Zou, Changfu</searchLink>, 1987
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <i>Användarbeteende informerad inlärning och intelligent kontroll för laddning av fordonsbatterier IEEE Transactions on Control Systems Technology</i>. 33(2):685-699
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Equalizers%22">Equalizers</searchLink><br /><searchLink fieldCode="DE" term="%22equalization+time+estimation%22">equalization time estimation</searchLink><br /><searchLink fieldCode="DE" term="%22Batteries%22">Batteries</searchLink><br /><searchLink fieldCode="DE" term="%22Mathematical+models%22">Mathematical models</searchLink><br /><searchLink fieldCode="DE" term="%22hypergraph%22">hypergraph</searchLink><br /><searchLink fieldCode="DE" term="%22unified+model%22">unified model</searchLink><br /><searchLink fieldCode="DE" term="%22Active+battery+equalization%22">Active battery equalization</searchLink><br /><searchLink fieldCode="DE" term="%22Vectors%22">Vectors</searchLink><br /><searchLink fieldCode="DE" term="%22State+of+charge%22">State of charge</searchLink><br /><searchLink fieldCode="DE" term="%22Hardware%22">Hardware</searchLink><br /><searchLink fieldCode="DE" term="%22Switches%22">Switches</searchLink><br /><searchLink fieldCode="DE" term="%22Integrated+circuit+modeling%22">Integrated circuit modeling</searchLink><br /><searchLink fieldCode="DE" term="%22Controllability%22">Controllability</searchLink><br /><searchLink fieldCode="DE" term="%22Analytical+models%22">Analytical models</searchLink>
– Name: Abstract
  Label: Description
  Group: Ab
  Data: Lithium-ion battery packs demand effective active equalization systems to enhance their usable capacity and lifetime. Despite numerous topologies and control schemes proposed in the literature, conducting quantitative analyses, comprehensive comparisons, and systematic optimization of their performance remains challenging due to the absence of a unified mathematical model at the pack level. To address this gap, we introduce a novel, hypergraph-based approach to establish the first unified model for various active battery equalization systems. This model reveals the intrinsic relationship between battery cells and equalizers by representing them as the vertices and hyperedges of hypergraphs, respectively. With the developed model, we identify the necessary conditions for all equalization systems to achieve balance through controllability analysis, offering valuable insights for selecting the number of equalizers. Moreover, we prove that the battery equalization time is inversely correlated with the second smallest eigenvalue of the hypergraph's Laplacian matrix of each equalization system. This significantly simplifies the selection and optimized design of equalization systems, obviating the need for extensive experiments or simulations to derive the equalization time. Illustrative results demonstrate the efficiency of the proposed model and validate our findings.
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1109/TCST.2024.3496439
    Languages:
      – Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 15
        StartPage: 685
    Subjects:
      – SubjectFull: Equalizers
        Type: general
      – SubjectFull: equalization time estimation
        Type: general
      – SubjectFull: Batteries
        Type: general
      – SubjectFull: Mathematical models
        Type: general
      – SubjectFull: hypergraph
        Type: general
      – SubjectFull: unified model
        Type: general
      – SubjectFull: Active battery equalization
        Type: general
      – SubjectFull: Vectors
        Type: general
      – SubjectFull: State of charge
        Type: general
      – SubjectFull: Hardware
        Type: general
      – SubjectFull: Switches
        Type: general
      – SubjectFull: Integrated circuit modeling
        Type: general
      – SubjectFull: Controllability
        Type: general
      – SubjectFull: Analytical models
        Type: general
    Titles:
      – TitleFull: A Unified Model for Active Battery Equalization Systems
        Type: main
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          Name:
            NameFull: Ouyang, Quan
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            NameFull: Ghaeminezhad, Nourallah
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            NameFull: Li, Yang
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            NameFull: Wik, Torsten
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            NameFull: Zou, Changfu
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            – D: 01
              M: 01
              Type: published
              Y: 2025
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            – TitleFull: Användarbeteende informerad inlärning och intelligent kontroll för laddning av fordonsbatterier IEEE Transactions on Control Systems Technology
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