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Batteries 2017, 3(1), 8; doi:10.3390/batteries3010008

Study on Factors for Accurate Open Circuit Voltage Characterizations in Mn-Type Li-Ion Batteries

Division of Electrical, Electronic and Information Engineering, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
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Author to whom correspondence should be addressed.
Academic Editor: Maciej Swierczynski
Received: 1 September 2016 / Revised: 26 February 2017 / Accepted: 8 March 2017 / Published: 12 March 2017
(This article belongs to the Special Issue Lithium Ion Batteries)
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Abstract

Open circuit voltage (OCV) of lithium batteries has been of interest since the battery management system (BMS) requires an accurate knowledge of the voltage characteristics of any Li-ion batteries. This article presents an OCV characteristic for lithium manganese oxide (LMO) batteries under several experimental operating conditions, and discusses factors for accurate OCV determination. A test system is developed for OCV characterization based on the OCV pulse test method. Various factors for the OCV behavior, such as resting period, step-size of the pulse test, testing current amplitude, hysteresis phenomena, and terminal voltage relationship, are investigated and evaluated. To this end, a general OCV model based on state of charge (SOC) tracking is developed and validated with satisfactory results. View Full-Text
Keywords: lithium-ion; battery characterization; lithium manganese oxide (LMO); open circuit voltage (OCV); battery test system; battery modeling lithium-ion; battery characterization; lithium manganese oxide (LMO); open circuit voltage (OCV); battery test system; battery modeling
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Somakettarin, N.; Funaki, T. Study on Factors for Accurate Open Circuit Voltage Characterizations in Mn-Type Li-Ion Batteries. Batteries 2017, 3, 8.

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