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Lithium ion battery is widely used in electric vehicles. To estimate battery state-of-charge, state-of-health and internal temperature accurately is not only in laboratory but also on-board significant. As a useful tool to study electrochemical system, numbers of estimation methods based on electrochemical impedance spectroscopy arise. The paper focuses on the relation between the battery states and...
Electrochemical Impedance Spectroscopy (EIS) has become a popular analytical technique for research and development of battery cells' chemistries, due to the established, high precision computer controlled equipment, that are capable of direct, on-line monitoring of performance parameters or degradation of an electrochemical system. Used for Lithium-ion (Li-ion) batteries, this method allows for a...
Online diagnostics for monitoring of battery cells in a battery pack is necessary in order to determine the state of the battery pack, like its age and safe operation. It could also provide the possibility to adjust the operation strategy of the battery management system and the load to increase the battery lifetime and safety. Impedance spectroscopy is a well-known measurement technique for electrochemical...
We present a fast, low-cost approach to measure battery impedance ‘on-line’ in a vehicle across a range of frequencies (1–2000 Hz). Impedance measurement has promise for improving battery management since it is a very effective non-invasive method of diagnosing the internal state of an electrochemical cell. It is useful for estimating temperature, ageing, state of charge (SOC) and for fault detection...
Impulse radio ultra-wideband (IR-UWB) is being employed in several IEEE standards for Wireless Sensor Network (WSN). This paper presents a battery model for small form factor, zinc-air button cell batteries with high energy density but also high internal impedance. Their usage in small form factor IR-UWB radios, requires accurate modeling to enable proper power management system design, avoiding system...
Proven methods of battery diagnosis exist in the industry based on the measurement of the internal impedance from cell to cell. Nevertheless, these maintenance methodologies are incompatible with the operation of the industrial traction batteries due to great variations of ambient temperature, the paralyzation needed, and access difficulty. This paper benefits from the tested stationary standards...
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