In order to identify charging characteristics, a series of
charging tests is performed on the batteries at 25 °C. Firstly,
the battery is discharged at 1 C (i.e. 15 A) and 25 °C until the
voltage reach 1.50 V. Then, the battery is kept inside the
chamber for 20 minutes for rest. After the rest, the battery is
charged with a constant current until the voltage reached the
cut-off voltage (i.e. 2.7 V for fast charging and 2.75 V for
standard charging). In this paper, constant current with
magnitudes of 7.5 A, 15 A and 30 A, which corresponding to
0.5 C, 1 C and 2 C, are applied on the battery, where 1 C
represents the charging rate for an empty battery to be fully
charged with 1 hour. The charging profile of the battery is
shown in Fig. 2. The charging profile shows that the charging
time for the battery is inversely proportional to the charging
rate.
In order to identify charging characteristics, a series ofcharging tests is performed on the batteries at 25 °C. Firstly,the battery is discharged at 1 C (i.e. 15 A) and 25 °C until thevoltage reach 1.50 V. Then, the battery is kept inside thechamber for 20 minutes for rest. After the rest, the battery ischarged with a constant current until the voltage reached thecut-off voltage (i.e. 2.7 V for fast charging and 2.75 V forstandard charging). In this paper, constant current withmagnitudes of 7.5 A, 15 A and 30 A, which corresponding to0.5 C, 1 C and 2 C, are applied on the battery, where 1 Crepresents the charging rate for an empty battery to be fullycharged with 1 hour. The charging profile of the battery isshown in Fig. 2. The charging profile shows that the chargingtime for the battery is inversely proportional to the chargingrate.
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