State of Charge-Dependent Polynomial Equivalent Circuit Modeling for Electrochemical Impedance Spectroscopy of Lithium-Ion Batteries

Wang, Qiankun; He, Yijun; Shen, Jinhua; Hu, Xiaosong; Ma, Zi-Feng

doi:10.1109/tpel.2017.2780184

Cited by 96 publications

(35 citation statements)

References 32 publications

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“…21 The electrochemical model-based estimation algorithm was also investigated. 25 Furthermore, the polynomial equivalent circuit model was constructed 26 for the electrochemical impedance spectroscopy of the lithium-ion batteries. 23 Other research groups as well as our research team have carried out in-depth research to enhance the lithium-ion battery pack safety by using the associated BMS equipment.…”

Section: Introductionmentioning

confidence: 99%

“…The reliability of the SOC estimation method was calculated by using the smooth variable structure filter 24 and the online internal resistance measurement. 25 Furthermore, the polynomial equivalent circuit model was constructed 26 for the electrochemical impedance spectroscopy of the lithium-ion batteries. The comparative optimization methods were analyzed for the parameter identification using different Equivalent Circuit Models (ECMs) for lithium-ion batteries.…”

Section: Introductionmentioning

confidence: 99%

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An improved packing equivalent circuit modeling method with the cell‐to‐cell consistency state evaluation of the internal connected lithium‐ion batteries

Wang

Shi

Fernandez

et al. 2019

Energy Science & Engineering

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The existing equivalent modeling methods reported in literature focuses mainly on the battery cells and do not take the packing consistency state into consideration, which exists on the internal connected cells of the lithium‐ion battery pack. An improved equivalent circuit model is constructed and reported in this manuscript for the first time, which can be used to characterize the working characteristics of the packing lithium‐ion batteries. A new equilibrium concept named as state of balance is proposed as well as the calculation process, which is realized by considering the real‐time detected internal battery cell voltages. In addition, this new equilibrium concept aims to obtain more information on the real‐time consistency characterization of the battery pack. The improved adaptive equivalent circuit model is investigated by using the improved splice modeling method, in which the statistical noise properties are corrected and the additional parallel resistance‐capacitance circuit is introduced. The parameter correction treatment is carried out by comparing the estimated and experimental detected closed circuit voltages. Furthermore, the tracking error is found to be 0.005 V and accounts for 0.119% of the nominal battery voltage. By taking the packing consistency state and temperature correction into consideration, the accurate working characteristic expression is realized in the improved equivalent circuit modeling process. Finally, the model proposed in this manuscript presents a great number of advantages compared to other methods reported so far, like has the high accuracy, and the ability to protect the security of the lithium‐ion battery pack in the power supply application.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An improved packing equivalent circuit modeling method with the cell‐to‐cell consistency state evaluation of the internal connected lithium‐ion batteries

Wang

Shi

Fernandez

et al. 2019

Energy Science & Engineering

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“…A recent paper by Wang et al proposes a state of chargedependent polynomial equivalent circuit model for lithium batteries. The model consists of an inductor, a Warburg element, a constant phase element (CPE) and two resistors [1]. Figure 1 shows the equivalent circuit model reproduced from [1].…”

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confidence: 99%

Comments on “State of Charge-Dependent Polynomial Equivalent Circuit Modeling for Electrochemical Impedance Spectroscopy of Lithium-Ion Batteries”

Hasan

Scott

2020

IEEE Trans. Power Electron.

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“…The LIB operation involves multiple electrochemical coupling reaction processes and therefore has strong nonlinear dynamic characteristics. 14,15 In order to describe the dynamic characteristics of LIBs, the equivalent modeling 16 mainly includes the electrochemical model and the equivalent circuit model (ECM) types. 14,15 In order to describe the dynamic characteristics of LIBs, the equivalent modeling 16 mainly includes the electrochemical model and the equivalent circuit model (ECM) types.…”

mentioning

confidence: 99%

“…13 The equivalent modeling is the basis of subsequent state estimation and safety management, which can realize the mathematical description of the state-space equation and has a wide range attention. 14,15 In order to describe the dynamic characteristics of LIBs, the equivalent modeling 16 mainly includes the electrochemical model and the equivalent circuit model (ECM) types. 17 The electrochemical model builds empirical mathematical equations by analyzing the internal physical mechanism and electrochemical reaction of the battery.…”

mentioning

confidence: 99%

A novel adaptive state of charge estimation method of full life cycling lithium‐ion batteries based on the multiple parameter optimization

Cao

Wang

Fernandez

et al. 2019

Energy Science & Engineering

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The state of charge (SoC) estimation is the safety management basis of the packing lithium‐ion batteries (LIB), and there is no effective solution yet. An improved splice equivalent modeling method is proposed to describe its working characteristics by using the state‐space description, in which the optimization strategy of the circuit structure is studied by using the aspects of equivalent mode, analog calculation, and component distribution adjustment, revealing the mathematical expression mechanism of different structural characteristics. A novel particle adaptive unscented Kalman filtering algorithm is introduced for the iterative calculation to explore the working state characterization mechanism of the packing LIB, in which the incorporate multiple information is considered and applied. The adaptive regulation is obtained by exploring the feature extraction and optimal representation, according to which the accurate SoC estimation model is constructed. The state of balance evaluation theory is explored, and the multiparameter correction strategy is carried out along with the experimental working characteristic analysis under complex conditions, according to which the optimization method is obtained for the SoC estimation model structure. When the remaining energy varies from 10% to 100%, the tracking voltage error is <0.035 V and the SoC estimation accuracy is 98.56%. The adaptive working state estimation is realized accurately, which lays a key breakthrough foundation for the safety management of the LIB packs.

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State of Charge-Dependent Polynomial Equivalent Circuit Modeling for Electrochemical Impedance Spectroscopy of Lithium-Ion Batteries

Cited by 96 publications

References 32 publications

An improved packing equivalent circuit modeling method with the cell‐to‐cell consistency state evaluation of the internal connected lithium‐ion batteries

An improved packing equivalent circuit modeling method with the cell‐to‐cell consistency state evaluation of the internal connected lithium‐ion batteries

Comments on “State of Charge-Dependent Polynomial Equivalent Circuit Modeling for Electrochemical Impedance Spectroscopy of Lithium-Ion Batteries”

A novel adaptive state of charge estimation method of full life cycling lithium‐ion batteries based on the multiple parameter optimization

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