Cell characterization of Lithium-ion capacitor with FreedomCAR and EIS method

Hasan Culcu, Joeri Van Mierlo (Editor), Bavo Verbrugge (Editor), Peter Van Den Bossche (Editor)

Research output: Chapter in Book/Report/Conference proceedingConference paper

5 Citations (Scopus)

Abstract

Lithium ion capacitor is a new electric storage device which combines high power density of a EDLC and high energy density of a battery. It has four time higher energy density than conventional supercapacitor and four time higher power density than a lithium battery. The characteristics of an electric storage device are usually determined by testing only one cell or the whole pack (without looking at the individual cells), with a low, constant current and by considering only one internal resistor. This is the easy way and gives good performance results, but this is not the reality where the batteries or capacitors are submitted to. In this research individual cell parameters (two internal resistors and two internal capacitors) of Li capacitor are determined at cell level and at module level with FreedomCAR model and Electrochemical Impedance Spectroscopy method. An extreme current profile is loaded to represent the reality. The model matches the measurements with an accuracy of 99%(+/-0.9%). The evolution of the parameters and the imbalance between the cells are studied as a function of SOC, frequency, current.
Original languageEnglish
Title of host publicationEVS24
Publication statusPublished - 15 May 2009
EventFinds and Results from the Swedish Cyprus Expedition: A Gender Perspective at the Medelhavsmuseet - Stockholm, Sweden
Duration: 21 Sep 200925 Sep 2009

Publication series

NameEVS24

Conference

ConferenceFinds and Results from the Swedish Cyprus Expedition: A Gender Perspective at the Medelhavsmuseet
CountrySweden
CityStockholm
Period21/09/0925/09/09

Keywords

  • lithium-ion capacitor
  • internal resistance
  • cell characteristics

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  • EVS24

    Joeri Van Mierlo (Organiser)
    12 May 200916 May 2009

    Activity: Participating in or organising an eventParticipation in conference

  • EVS24

    Julien Matheys (Participant)
    12 May 200916 May 2009

    Activity: Participating in or organising an eventParticipation in conference

  • EVS24

    Frederik Van Mulders (Participant)
    12 May 200916 May 2009

    Activity: Participating in or organising an eventParticipation in conference

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