Study Performance of AA Cells

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Transcript Study Performance of AA Cells

STUDY PERFORMANCE OF AA
CELLS
BY: BRIAN COURTRIGHT, JASMINE JACOB,
KATHLEEN PRILUTSKI, AND GABRIEL ROSENWALD
STUDY PERFORMANCE OF AA CELLS
• Disposable cameras use AA batteries to power the flash
and other functions. We studied the endurance of these
batteries by completing a lab in which we hooked up a
battery to a multimeter and a breadboard connected
to four parallel resistors. A voltage was recorded every
five minutes for thirty-five minutes. In this lab it was found
that a AA battery can be reused up to nine times using
twenty-seven flashes. We found this by calculating the
capacity by multiplying the average discharge current
value by the time required to reach terminal
voltage. We then compared this to the capacity of just
one flash cycle. Recycling the battery nine times
certainly cuts down cost of these cameras and definitely
helps in reducing waste.
DATA OF AA CELLS
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AA cell used: Alkaline Resistors used (Ω): 4
Initial Voltage (V) without load: 1.63 V
Final Voltage (V) without load: 1.278V
Measured Resistance Ω (of resistive load): 1.1 Ω
DATA COLLECTED FROM AA CELL
Time (min)
Voltage (V)
Current (A)
Power (W)
0
1.08
0.981
1.06036
5
0.984
0.8945
0.8802327
10
0.930
0.845
0.78627
15
0.905
0.8227
0.7445681
20
0.885
0.8045
0.7120227
25
0.862
0.7836
0.6754945
30
0.828
0.7527
0.6232581
35
0.809
0.7354
0.594827
CAPACITY OF TESTED AA CELL
• Determine the estimated capacity of tested AA cell
by multiplying the average current through resistive
load and time taken to achieve the terminal
voltage. Express your results in Ampere-Hour.
• 0.82745 Ampere*(35min/60 min)*1hour=
• 0.4826645833 Ampere-Hour
This results in 268.1469907charges per one flash. By
using the knowledge that it takes 0.0018
Ampere*Hour during one flash charge cycle.