A Multi-Channel Fast Impedance Spectroscopy Instrument Developed for Quality Assurance of Super-Capacitors

Farooq, Farhan; Khan, Asad; Lee, Seung June; Nadeem, M; Choi, Woojin

doi:10.3390/en14041139

Cited by 5 publications

(4 citation statements)

References 20 publications

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“…These values must be close to real values. Otherwise, the EKF is unable to accurately identify the correct values of SC parameters (state vector) [21]- [23]. This limitation was also highlighted in this paper (section 5).…”

Section: Introductionmentioning

confidence: 79%

“…Unlike the bias voltage expressed in (23), as shown in (25) takes into account the capacitance. Therefore, the bias voltage expressed in (25) will be used in the complementary correction of capacitance.…”

Section: Complementary Pid Correctormentioning

confidence: 99%

“…In [22] also proposed an online identification technique based on the EKF to estimate the temperature and the state of charge of a supercapacitor. In [23] proposed two real-time observers for the prediction of supercapacitors' capacitance and the resistance. One is based on EKF and the other is based on interconnected observers.…”

Section: Introductionmentioning

confidence: 99%

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Online diagnosis of supercapacitors using extended Kalman filter combined with PID corrector

Bououchma

Sabor

2021

IJPEDS

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<span>Supercapacitors are electrical energy storage devices with a high specific power density, a long cycle life and a good efficiency, which make them attractive alternative storage devices for various applications. However, supercapacitors are subject to a progressive degradation of their perfor-mance because of aging phenomenon. Therefore, it is very important to be able to estimate their State-of-Health during operation. Electrochemical Impedance Spectroscopy (EIS) is a very recog-nized technique to determine supercapacitors’ state-of-health. However, it requires the interrup-tion of system operation and thus cannot be performed in real time (online). In this paper, a new online identification method is proposed based on extended Kalman observer combined with a complementary PID corrector. The proposed method allows to accurately estimating supercapacitor resistance and capacitance, which are the main indicators of supercapacitor state-of-health. The new online identification method was applied for two voltage/current profiles using two different supercapacitors. The resistance/capacitance estimated by the new method and the conventional EKF were compared with those obtained by an experimental offline method. In comparison with conventional EKF, the capacitance obtained by the new method is significantly more accurate.</span>

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Section: Introductionmentioning

confidence: 79%

Section: Complementary Pid Correctormentioning

confidence: 99%

See 1 more Smart Citation

Online diagnosis of supercapacitors using extended Kalman filter combined with PID corrector

Bououchma

Sabor

2021

IJPEDS

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“…Farooq et al [1] developed a multi-channel fast EIS instrument to measure the impedances of the multiple numbers of supercapacitors. This technique is based on a multi-frequency EIS method using multi-sine sweeping that can replace the time-consuming DC tests, such as charge/discharge and self-discharge tests.…”

Section: Special Issue Contentmentioning

confidence: 99%