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Measurement Scheme

Li-ion batteries in batches of 4 are run through 3 different operational profiles (charge, discharge and impedance) at ambient temperatures of 4, 24 and 44 oC. Charging was carried out in a constant current (CC) mode at 1.5A until the battery voltage reached 4.2V and then continued in a constant voltage (CV) mode until the charge current dropped to 20mA. Fixed and variable load currents at 1, 2, and 4 Amps were used and the discharge runs were stopped at 2V, 2.2V, 2.5V or 2.7V. Impedance measurement was carried out through an electrochemical impedance spectroscopy (EIS) frequency sweep from 0.1Hz to 5kHz. The experiments were carried out until the capacity had reduced to at least 1.6Ahr (20% fade).

All the data can be downloaded from the NASA Prognostics Data Repository.

Data structure: Data Structure

Discharge curve: Data Structure

Aging curve: Data Structure

EIS curves: Data Structure

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