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The impedance represents one of the most important performance parameters of the Lithium-ion batteries since it used for power capability calculations, battery pack and system design, cooling system design and also for state-of-health estimation. In the literature, different approaches are presented for measuring the impedance of Lithium-ion batteries and electrochemical impedance spectroscopy and...
Lithium-ion batteries have developed into a popular energy storage choice for a wide range of applications because of their superior characteristics in comparison to other energy storage technologies. Besides modelling the performance behavior of Lithium-ion batteries, it has become of huge interest to accurately diagnose their state-of-health (SOH). At present, Lithium-ion batteries are diagnosed...
The SOH of batteries is critical information for electric vehicle (EV) and hybrid electric vehicle (HEV) systems. This paper proposes an SOH estimation system based on time-constant-ratio measurement. There are two reasons of choosing time-constant as aging criterion. First, time-constant represents the response speed of terminal voltage during charging and discharging. Second, time-constant represents...
As the need for better prediction of battery life parameters in secondary batteries evolves, especially for electric vehicles, many researchers have looked for methods beyond simple battery modeling. One of the promising methods is electrochemical impedance spectroscopy. This is typically a technique used to get insight on the kinetic reactions in batteries and various studies have shown excellent...
Impedance has been discussed for a long time as an indicator for the state of health (SOH) of lead-acid batteries for standby applications such as UPS systems. The research contains the analysis of the relation between capacity and impedance measurement at different frequencies. Several batteries of different manufacturers and capacity were aged systematically and the impedance measurements were done...
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