Advancements in OCV Measurement and Analysis for Lithium-Ion Batteries

Petzl, Mathias; Danzer, Michael A.

doi:10.1109/tec.2013.2259490

Cited by 166 publications

(80 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Equivalent circuit models comprising inductive, resistive and capacitive elements can be used to simulate the battery impedance [38]- [40]. A simple, but very convenient equivalent circuit model for a theoretical analysis is shown in Fig.…”

Section: (Non)-zero Intercept Frequency Modelingmentioning

confidence: 99%

Non-Zero Intercept Frequency: An Accurate Method to Determine the Integral Temperature of Li-Ion Batteries

Raijmakers

Danilov

Lammeren

et al. 2016

IEEE Trans. Ind. Electron.

View full text Add to dashboard Cite

Abstract-A new impedance-based approach is introduced in which the integral battery temperature is related to other frequencies than the recently developed zero-intercept frequency (ZIF). The advantage of the proposed non-zero-interceptfrequency (NZIF) method is that measurement interferences, resulting from the current flowing through the battery (pack), can be avoided at these frequencies. This gives higher signal-tonoise ratios (SNR) and, consequently, more accurate temperature measurements. A theoretical analysis, using an equivalent circuit model of a Li-ion battery, shows that NZIFs are temperature dependent in a way similar to the ZIF and can therefore also be used as a battery temperature indicator. To validate the proposed method impedance measurements have been performed with individual LiFePO4 batteries and with large LiFePO4 battery packs tested in a full electric vehicle under driving conditions. The measurement results show that the NZIF is clearly dependent on the integral battery temperature and reveals a similar behavior to that of the ZIF method. This makes it possible to optimally adjust the NZIF method to frequencies with the highest SNR.

show abstract

Section: (Non)-zero Intercept Frequency Modelingmentioning

confidence: 99%

Non-Zero Intercept Frequency: An Accurate Method to Determine the Integral Temperature of Li-Ion Batteries

Raijmakers

Danilov

Lammeren

et al. 2016

IEEE Trans. Ind. Electron.

View full text Add to dashboard Cite

show abstract

“…Hybrid pulse power capability (HPPC), based on the IEC6266-1 standard [37,38]; 3. Open-circuit voltage (OCV) [39,40].…”

Section: Thermal Characterization Of the Nmc Cellsmentioning

confidence: 99%

Combining an Electrothermal and Impedance Aging Model to Investigate Thermal Degradation Caused by Fast Charging

et al. 2018

View full text Add to dashboard Cite

Fast charging is an exciting topic in the field of electric and hybrid electric vehicles (EVs/HEVs). In order to achieve faster charging times, fast-charging applications involve high-current profiles which can lead to high cell temperature increase, and in some cases thermal runaways. There has been some research on the impact caused by fast-charging profiles. This research is mostly focused on the electrical, thermal and aging aspects of the cell individually, but these factors are never treated together. In this paper, the thermal progression of the lithium-ion battery under specific fast-charging profiles is investigated and modeled. The cell is a Lithium Nickel Manganese Cobalt Oxide/graphite-based cell (NMC) rated at 20 Ah, and thermal images during fast-charging have been taken at four degradation states: 100%, 90%, 85%, and 80% State-of-Health (SoH). A semi-empirical resistance aging model is developed using gathered data from extensive cycling and calendar aging tests, which is coupled to an electrothermal model. This novel combined model achieves good agreement with the measurements, with simulation results always within 2°C of the measured values. This study presents a modeling methodology that is usable to predict the potential temperature distribution for lithium-ion batteries (LiBs) during fast-charging profiles at different aging states, which would be of benefit for Battery Management Systems (BMS) in future thermal strategies.

show abstract

“…Too short a rest time leads to a large OCV estimation error, whereas too long a rest time makes the whole test time consuming. It has been shown previously that for the lithium-ion polymer batteries, electrochemical reactions are negligible after a 2-h rest period [47,48]. Therefore, the rest time in this paper is predetermined as 2 h.…”

Section: Parameter Extraction Test Designmentioning

confidence: 99%

Improved Battery Parameter Estimation Method Considering Operating Scenarios for HEV/EV Applications

et al. 2016

View full text Add to dashboard Cite

This paper presents an improved battery parameter estimation method based on typical operating scenarios in hybrid electric vehicles and pure electric vehicles. Compared with the conventional estimation methods, the proposed method takes both the constant-current charging and the dynamic driving scenarios into account, and two separate sets of model parameters are estimated through different parts of the pulse-rest test. The model parameters for the constant-charging scenario are estimated from the data in the pulse-charging periods, while the model parameters for the dynamic driving scenario are estimated from the data in the rest periods, and the length of the fitted dataset is determined by the spectrum analysis of the load current. In addition, the unsaturated phenomenon caused by the long-term resistor-capacitor (RC) network is analyzed, and the initial voltage expressions of the RC networks in the fitting functions are improved to ensure a higher model fidelity. Simulation and experiment results validated the feasibility of the developed estimation method.

show abstract

Advancements in OCV Measurement and Analysis for Lithium-Ion Batteries

Cited by 166 publications

References 23 publications

Non-Zero Intercept Frequency: An Accurate Method to Determine the Integral Temperature of Li-Ion Batteries

Non-Zero Intercept Frequency: An Accurate Method to Determine the Integral Temperature of Li-Ion Batteries

Combining an Electrothermal and Impedance Aging Model to Investigate Thermal Degradation Caused by Fast Charging

Improved Battery Parameter Estimation Method Considering Operating Scenarios for HEV/EV Applications

Contact Info

Product

Resources

About