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Study on Factors for Accurate Open Circuit Voltage Characterizations in Mn-Type Li-Ion Batteries
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Study on Factors for Accurate Open Circuit Voltage Characterizations in Mn-Type Li-Ion Batteries
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Journal Article
Study on Factors for Accurate Open Circuit Voltage Characterizations in Mn-Type Li-Ion Batteries
2017
Overview
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.
Publisher
MDPI AG
Subject
