  This paper is the second part of a series of papers about empirical
approaches to open circuit voltage (OCV) modeling and its performance
comparison in lithium-ion batteries. The first part of the series introduced
various sources of uncertainties in the OCV models and established a
theoretical relationship between uncertainties and the performance of a battery
management system. In this paper, clearly defined approaches for low-rate OCV
data collection are defined and described in detail. The data collection is
designed with consideration to several parameters that affect the experimental
time. Firstly, a more suitable method to fully charge the battery at different
C-Rates is defined. Secondly, the OCV characterization following the full
charge is described for various performance comparisons. Finally, optimal and
efficient resistance estimation profiles are discussed. From the voltage,
current and time data recorded using the procedure described in this paper, the
OCV-SOC relationship is characterized and its uncertainties are modeled in the
third part of this series of papers.
