Noise diagnosis of commercial Li-ion batteries using high-order moments

Electrochemical noise diagnostics (END) has been applied to commercial Li-ion batteries. This diagnostics is based on recording small voltage fluctuations of the battery during discharge. In order to avoid apparatus noise the direct measurements of voltage have been used without filtering and statis...

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Bibliographic Details
Published in:Russian journal of electrochemistry 2016-12, Vol.52 (12), p.1122-1130
Main Authors: Martemianov, S., Maillard, F., Thomas, A., Lagonotte, P., Madier, L.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Discharge
Electric charge
Electric potential
Electrochemical noise
Electrochemistry
Engineering Sciences
Kurtosis
Lithium-ion batteries
Physical Chemistry
Physics
State of charge
Voltage
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Summary:Electrochemical noise diagnostics (END) has been applied to commercial Li-ion batteries. This diagnostics is based on recording small voltage fluctuations of the battery during discharge. In order to avoid apparatus noise the direct measurements of voltage have been used without filtering and statistical descriptors of process have been calculated, namely standard deviation (STD), skewness (SK) and kurtosis (KU). It was demonstrated, as a function of State of Charge (SOC), that the noise increases drastically at the beginning (SOC > 97%) and the end (SOC < 4%) of the discharge. The noise is quasi-uniform and non-Gaussian with SK = 0 and KU =–1.2. In the boundaries between the beginning and the middle and between the middle and the end, an important variations of SK and KU have been detected.
ISSN:1023-1935
1608-3342
DOI:10.1134/S1023193516120089