Validation of single frequency Z measurement for standby battery state of health determination

Kiel, M.; Sauer, Dirk Uwe; Turpin, P. J.; Naveed, Muhammad; Favre, Éric

doi:10.1109/intlec.2008.4664020

Cited by 11 publications

(15 citation statements)

References 6 publications

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“…Conventional methods can be categorized as capacity test [24], electrochemical impedance spectroscopy (EIS) measurement [25]- [29], and ohmic impedance extraction [30], [31]. The capacity test is a straight forward approach to estimate SoH.…”

Section: (A)mentioning

confidence: 99%

“…In 2004, Takeno et al have shown a strong correlation between the Li-ion battery capacity and the impedance at 1 kHz, which is equal to the ohmic resistance, and proposed a quick testing for assessing degradation in battery packs [30]. In 2008, Kiel et al have proposed a low-cost device that applies a square wave pulse instead of a sinusoidal signal for the AC impedance measurement and SoH determination [31]. Later, Kim [10] and Gholizadeh et al [11] used the ohmic resistance for online SoH estimation.…”

Section: (A)mentioning

confidence: 99%

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Offline State-of-Health Estimation for High-Power Lithium-Ion Batteries Using Three-Point Impedance Extraction Method

Yuan

Dung

2017

IEEE Trans. Veh. Technol.

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This paper presents an offline state-of-health (SoH) estimation based on charge transfer resistance for high power lithium-ion batteries, such as lithium iron phosphate or LFP batteries. As shown in the experimental results, the charge transfer resistance has a great aging change with battery degradation and good abilities against the state-of-charge (SoC) drift and external resistance variation in the impedance parameter set of a single-time-constant equivalent circuit model (ECM) including ohmic resistance, charge transfer resistance, doublelayer capacitance, and time constant, for SoH estimation. A fast and efficient three-point (TP) impedance extraction method is also proposed in this paper for accurately extracting the charge transfer resistance in offline SoH estimation. The results of longterm cycling test demonstrate that the TP impedance extraction method can successfully indicate the SoH of LFP batteries with low estimation error of 6.1%.Index Terms-Lithium battery, state-of-health (SoH), impedance estimation, offline battery measurement, battery second-use.

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Section: (A)mentioning

confidence: 99%

Section: (A)mentioning

confidence: 99%

Offline State-of-Health Estimation for High-Power Lithium-Ion Batteries Using Three-Point Impedance Extraction Method

Yuan

Dung

2017

IEEE Trans. Veh. Technol.

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“…One common but strongly discussed measure for the SoH of a battery are impedance or admittance readings as they are non-invasive and cause no down time compared to regular capacity tests. It is expected that the measured impedance increases over the lifetime of the battery and thus with decreasing SoH [2][3][4][5][6]. Likewise, the admittance decreases.…”

Section: Introductionmentioning

confidence: 99%

Battery State Estimation for Lead-Acid Batteries under Float Charge Conditions by Impedance: Benchmark of Common Detection Methods

Badeda¹,

Kwiecien

Schulte³

et al. 2018

Applied Sciences

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Impedance or admittance measurements are a common indicator for the condition of lead-acid batteries in field applications such as uninterruptible power supply (UPS) systems. However, several commercially available measurement units use different techniques to measure and interpret the battery impedance. This paper describes common measurement methods and compares their indication for the state of health (SoH) to those of electrochemical impedance spectroscopy (EIS). For this analysis, two strings consisting each of 24 valve-regulated lead-acid (VRLA) batteries with a rated voltage of 12 V and about 7 Ah capacity were kept under standard UPS conditions in float charge for over 560 days. They were monitored continuously with a LEM Sentinel 2 and went into regular check-ups with impedance measurements by a Hioki BT3554 as well as electrochemical impedance spectroscopy (EIS) measurements with an impedance meter (μEIS). Today it is widely expected that solely the relative increase of the impedance reading is sufficient for the estimation of the available capacity. However, it can be shown that the measured relative increase deviates for different frequencies and therefore the choice of the excitation signal and measurement frequency does make a difference for the calculation of the available capacity. Finally, a method for a more decisive monitoring in field applications is suggested.

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“…A more expensive method may use a sinusoidal signal at different frequencies to determine the corresponding impedance (e.g. impedance spectroscopy) [12].…”

Section: Introductionmentioning

confidence: 99%

Practical Online Estimation of Lithium-Ion Battery Apparent Series Resistance for Mild Hybrid Vehicles

Lièvre

Sarı

Venet

et al. 2016

IEEE Trans. Veh. Technol.

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In hybrid vehicles, lithium-ion cells constituting a battery pack are frequently used to provide and recover high power in order to assist the vehicle's Internal Combustion Engine (ICE) powertrain. This usage is more present in mild hybrid applications where the battery does not have long discharge time. In such conditions, the pack's series resistance R S proved to be an important parameter to monitor since its evolution depends on the cells characteristics (manufacturing tolerances, temperature...). This resistance, monitored by the Battery Management System (BMS), reflecting the available power level in the cell can be used as an indicator to enhance the security of the battery pack. Its evolution can be used to quantify its aging (State of Health). This paper presents an online approach to identify the cells series resistance based on a direct estimation of R S . This parameter can be usually identified through the voltage drop occurring across the cell caused by a high current variation profile (mild hybrid conditions).These estimated values are then filtered with an "exponential moving average" method to limit the measurement noise effect. This approach provides good results for mild hybrid conditions, while minimizing the computing power required.

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Validation of single frequency Z measurement for standby battery state of health determination

Cited by 11 publications

References 6 publications

Offline State-of-Health Estimation for High-Power Lithium-Ion Batteries Using Three-Point Impedance Extraction Method

Offline State-of-Health Estimation for High-Power Lithium-Ion Batteries Using Three-Point Impedance Extraction Method

Battery State Estimation for Lead-Acid Batteries under Float Charge Conditions by Impedance: Benchmark of Common Detection Methods

Practical Online Estimation of Lithium-Ion Battery Apparent Series Resistance for Mild Hybrid Vehicles

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