Influence of High-Frequency Charge–Discharge Cycling Induced by Cell Voltage Equalizers on the Life Performance of Lithium-Ion Cells

2011 ◽  
Vol 60 (4) ◽  
pp. 1505-1515 ◽  
Author(s):  
M Uno ◽  
K Tanaka
Keyword(s):  
High Frequency ◽  
Lithium Ion ◽  
Cell Voltage ◽  
Lithium Ion Cells ◽  
Charge Discharge

Degradation-Safety Analytics in Lithium-Ion Cells: Part I. Aging under Charge/Discharge Cycling

2020 ◽  
Vol 167 (16) ◽  
pp. 160510
Author(s):  
Daniel Juarez-Robles ◽  
Judith A. Jeevarajan ◽  
Partha P. Mukherjee
Keyword(s):  
Lithium Ion ◽  
Lithium Ion Cells ◽  
Charge Discharge

Transport in Cathode of Lithium-Ion Cells

2006 ◽  
Vol 517 ◽  
pp. 101-104 ◽  
Author(s):  
Siti Aishah Hashim Ali
Keyword(s):  
Mathematical Model ◽  
Analytical Solutions ◽  
Lithium Ion ◽  
Cell Voltage ◽  
Voltage Versus ◽  
Discharge Characteristics ◽  
Lithium Ion Cells ◽  
Lithium Ion Cell ◽  
Model Equations ◽  
Discharge Curves

A mathematical model for the transport in cathode of a lithium-ion cell is developed and analytical solutions to the model equations are obtained. The derived equation is tested by fitting it to published experimental discharge characteristics. Wherever possible, the values of the relevant parameters are obtained from the same literature from which the discharge characteristics were obtained. The agreement between the predicted and the experimental discharge curves are measured statistically using t-test. Since the discharge characteristics are usually plotted as voltage versus time or capacity or even state-of-discharge, hence the expression for the cell voltage has been derived.

Monitoring of Intercalation Stages in Lithium-Ion Cells over Charge-Discharge Cycles with Fiber Optic Sensors

2015 ◽  
Vol 162 (14) ◽  
pp. A2664-A2669 ◽  
Author(s):  
Lars Wilko Sommer ◽  
Ajay Raghavan ◽  
Peter Kiesel ◽  
Bhaskar Saha ◽  
Julian Schwartz ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Lithium Ion ◽  
Fiber Optic Sensors ◽  
Lithium Ion Cells ◽  
Charge Discharge

Effects of Hydrothermal Oxidation Temperature on the Performance of Natural Graphite as an Anode for Lithium-Ion Cells

2011 ◽  
Vol 14 (3) ◽  
pp. 153-157 ◽  
Author(s):  
Mi Lu ◽  
Yanyan Tian ◽  
Bing Huang ◽  
Xiaodong Zheng
Keyword(s):  
Electrochemical Performance ◽  
Room Temperature ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Photoelectron Spectra ◽  
Oxidation Temperature ◽  
Natural Graphite ◽  
Lithium Ion Cells ◽  
Effects Of Temperature ◽  
Charge Discharge

Natural graphite (NG) was hydrothermally oxidized at room temperature, 100 ºC and 200 ºC respectively to analyze the effects of temperature on the electrochemical performance of the NG as an anode for lithium ion cells. Charge/discharge results showed that the sample treated at 100 ºC exhibited the highest initial intercalation capacity of 340.1 mAh/g and a Coulombic efficiency of 89.9%, while the sample treated at 200 ºC showed the highest capacity retention of 96.5% after 20 charge/discharge cycles. X-ray photoelectron spectra revealed that groups containing oxygen were present on the surface of all samples, which explains why the performance of the sample treated at room temperature shows slightly improved electrochemical performance that can be further improved by increasing the oxidation temperature.

scholarly journals Algorithm to Determine the Knee Point on Capacity Fade Curves of Lithium-Ion Cells

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2910 ◽  
Author(s):  
Weiping Diao ◽  
Saurabh Saxena ◽  
Bongtae Han ◽  
Michael Pecht
Keyword(s):  
Lithium Ion ◽  
Storage Conditions ◽  
Capacity Fade ◽  
Lithium Ion Cells ◽  
Knee Point ◽  
Extended Charge ◽  
Definition Of ◽  
And Storage ◽  
Charge Discharge

Lithium-ion batteries typically exhibit a transition to a more rapid capacity fade trend when subjected to extended charge–discharge cycles and storage conditions. The identification of the knee point can be valuable to identify the more severe degradation trend, and to provide guidance when scheduling battery replacements and planning secondary uses of the battery. However, a concise and repeatable determination of a knee point has not been documented. This paper provides a definition of the knee point which can be used as a degradation metric, and develops an algorithm to identify it. The algorithm is implemented on various data cases, and the results indicate that the approach provides repeatable knee point identification.

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