Precise Online Electrochemical Impedance Spectroscopy Strategies for Li-Ion Batteries

Islam, Saiful; Park, Sung-Yeul

doi:10.1109/tia.2019.2958555

Cited by 55 publications

(21 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the converter-based online battery impedance method in [5,8,12,17], the duty cycle is perturbed at a given frequency ( f p ) around its steady-state value (D). This duty cycle perturbation will result in small signal AC perturbations of the battery current and voltage around their corresponding steady-state DC values (I B,dc and V B,dc ).…”

Section: Review Of the Converter-based Duty Cycle Perturbation Battermentioning

confidence: 99%

Accurate Online Battery Impedance Measurement Method with Low Output Voltage Ripples on Power Converters

Yao

Lei

2021

Energies

View full text Add to dashboard Cite

The conventional online battery impedance measurement method works by perturbing the duty cycle of the DC-DC power converter and measuring the response of the battery voltage and current. This periodical duty cycle perturbation will continuously generate large voltage ripples at the output of power converters. These large ripples will not easily be removed due to the high amplitude and wide frequency range and would be a challenge to meet tight output regulation. To solve this problem, this paper presents a new online battery impedance measurement technique by inserting a small switched resistor circuit (SRC) into the converter. The first contribution of this work is that the perturbation source is moved from the main switch to the input-side of the converter, so the ripples are reduced. The analysis and experimental results of the proposed method show a reduction of 16-times compared with the conventional method. The second contribution tackles the possible change of the battery state of charge (SOC) during the online battery measurement process, which will inevitably influence the impedance measurement accuracy. In this proposed method, battery impedance at multiple frequencies can be measured simultaneously using only one perturbation to accelerate measurement speed and minimize possible SOC change. The experimental impedance results coincide with a high-accuracy laboratory battery impedance analyzer.

show abstract

Section: Review Of the Converter-based Duty Cycle Perturbation Battermentioning

confidence: 99%

Accurate Online Battery Impedance Measurement Method with Low Output Voltage Ripples on Power Converters

Yao

Lei

2021

Energies

View full text Add to dashboard Cite

show abstract

“…An AC current injector for batteries was implemented using buck, synchronous buck, boost, and resonant power converters [1][2][3][4][7][8][9][10]. A synchronous buck converter for AC current injection to battery was used in this paper as shown in Figure 3.…”

Section: Topologies and Modulationmentioning

confidence: 99%

“…For a Valence U-12XP 40 Ah 13.8 V Li-Ion battery, the model components are L = 0.34 µH, R Ω = 5.65 mΩ, C DL = 4.29 F, R CT = 1.23 mΩ and σ = 2.05 × 10 −3 at 25% state of charge [9]. The bode plot of the battery impedance is shown in Figure 8.…”

Section: Battery Modelmentioning

confidence: 99%

“…Conventionally, AC current is injected to rechargeable batteries using linear circuits which work offline (the batteries are disconnected from the applications) [5,6]. Recently, power converters are being used to inject AC current to rechargeable batteries which can be operated either offline or online (the battery is connected to the applications) [1][2][3][4][7][8][9][10][11][12][13]. A buck converter topology was used to inject AC current on top of DC charging current in [9].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, power converters are being used to inject AC current to rechargeable batteries which can be operated either offline or online (the battery is connected to the applications) [1][2][3][4][7][8][9][10][11][12][13]. A buck converter topology was used to inject AC current on top of DC charging current in [9]. AC current was imposed on top of discharging current in [10].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Versatile AC Current Control Technique for a Battery Using Power Converters

Islam

Park

2021

Batteries

Self Cite

View full text Add to dashboard Cite

Although a battery is a DC device, AC current is often necessary for testing, preheating, impedance spectroscopy, and advanced charging. This paper presents a versatile control technique to inject AC current to a battery. Synchronous buck and H-bridge topologies are operated in bidirectional mode and controlled by uni-polar and bi-polar pulse width modulation techniques for the AC current injection. The input and output passive circuits are specially designed considering AC current and the properties of the battery. A controller is proposed considering a small internal impedance, small AC ripple voltage, and variable DC offset voltage of a battery. The controller is capable of maintaining stable operation of AC current injection in two power quadrant within a small DC voltage boundary of a battery. The controller is comprised of a feedback compensator, a feedforward term, and an estimator. The feedback gain is designed considering the internal impedance. The feedforward gain is designed based on estimated open circuit battery voltage and input voltage. The open circuit voltage estimator is designed based on filters and battery model. For validation, AC current is injected to a Valence U-12XP battery. The battery is rated for 40 Ah nominal capacity and 13.8 V nominal voltage The controller successfully injected AC current to a battery with +10 A, 0 A and −10 A DC currents. The magnitude and frequency of the AC current was up to 5 A and 2 kHz respectively.

show abstract

A review of battery state of charge estimation and management systems: Models and future prospective

Hussein,

Aghmadi,

Abdelrahman

et al. 2024

WIREs Energy & Environment

View full text Add to dashboard Cite

Batteries are considered critical elements in most applications nowadays due to their power and energy density features. However, uncontrolled charging and discharging will negatively affect their functions and might result in a catastrophic failure of their applications. Hence, a battery management system (BMS) is mandated for their proper operation. One of the critical elements of any BMS is the state of charge (SoC) estimation process, which highly determines the needed action to maintain the battery's health and efficiency. Several methods were used to estimate the Lithium‐ion batteries (LIBs) SoC, depending on the LIBs model or any other suitable technique. This article provides a critical review of the existing SoC estimation approaches and the main LIB models with their pros and cons, their possibility to integrate with each other's for precise estimation results, and the applicability of these techniques in electric vehicles and utility applications with the commonly used standards and codes in these sectors. Moreover, this study will also explore a future framework for integrating digital twins (DTs) with BMSs for improved and advanced management. Based on this comprehensive review, it can be concluded that merging the model‐based estimation techniques with the data‐driven approaches with their promising development to determine the dynamic patterns inside the battery can efficiently achieve precise estimation results while reducing the complexity of these models. This integration will align also with the integration of digital twin technology to provide complete and accurate supervision for the BMSs.This article is categorized under: Emerging Technologies > Energy Storage Emerging Technologies > Digitalization Energy and Power Systems > Distributed Generation

show abstract

Precise Online Electrochemical Impedance Spectroscopy Strategies for Li-Ion Batteries

Cited by 55 publications

References 24 publications

Accurate Online Battery Impedance Measurement Method with Low Output Voltage Ripples on Power Converters

Accurate Online Battery Impedance Measurement Method with Low Output Voltage Ripples on Power Converters

Versatile AC Current Control Technique for a Battery Using Power Converters

A review of battery state of charge estimation and management systems: Models and future prospective

Contact Info

Product

Resources

About