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A successive approximation method to precisely measure leakage current of the rechargeable Lithium coin battery

Yue, X.; Kiely, J.; Ghauri, S.; Kauer, M.; Bellanger, M.; Gibson, D.


Alex Yue
Senior Lecturer in Bioinstrumentation and Sensor Interfacing

J. Kiely

S. Ghauri

M. Kauer

M. Bellanger

D. Gibson


© 2017 Elsevier Ltd When the rechargeable Lithium coin battery is employed as the storage component for indoor energy harvesting, the leakage current of the battery cannot be ignored, especially in ultra-low-power applications. The leakage current of the Lithium coin battery is commonly believed in the low μA range. However the exact value is unknown. An experimental method to measure leakage current by applying a known charge current in μAs to a stabilized post-charge battery to observe the sign of the battery terminal voltage change is proposed. When the applied charge current is larger than the leakage current, a positive sign (terminal voltage increase) can be observed. Otherwise a negative sign appears. By gradually changing the charge current using the successive approximation search algorithm, the leakage current will finally converge to the applied charge current. The convergence happens after the sign changes in two successive search procedures, demonstrating that charge currents are approaching the leakage current from both directions. The accuracy of the approximation can be improved by adjusting the number of sign changes in the successive approximation search algorithm. The proposed method permits the full capacity of a rechargeable Lithium coin battery to be utilised in ultra-low-power applications.


Yue, X., Yue, X., Kiely, J., Ghauri, S., Kauer, M., Bellanger, M., & Gibson, D. (2017). A successive approximation method to precisely measure leakage current of the rechargeable Lithium coin battery. Journal of Energy Storage, 13, 442-446.

Journal Article Type Article
Acceptance Date Aug 31, 2017
Online Publication Date Sep 15, 2017
Publication Date Oct 1, 2017
Journal Journal of Energy Storage
Print ISSN 2352-152X
Electronic ISSN 2352-152X
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 13
Pages 442-446
Keywords leakage current, lithium coin battery, trickle charge, successive approximation
Public URL
Publisher URL


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