082418

(V)

30 min

DC

Power

Supply

Multimeter

+

-

+

1k Ω

1

0

Step 1

Step 2

Cycle 1

Step 3

Step 4

Step 6

Step 5

Step 2

Cycle 2

Step 3

Step 4

Step 6

Step 5

TEST METHODS

IEC Capacitance Test Method

• Capacitance is measured using a Keithley 2400 or 2602 Meter

• Procedure

• Charge Capacitor to Rated Voltage at room temperature

• Disconnect parts from voltage to remove charging effects

• Discharge cells with a constant current I determined by

4 * C * VR

• Noting V1, t1, V2, t2 and performing the calculation for C

Voltage

Times (s)

DCL Measurement @ 25°C

• DCL is measured using a Multimeter with high internal impedance

across a resistor

• Charge Capacitor to Rated Voltage at room temperature for

72 Hours

• Disconnect parts from Voltage by opening switch 1 (Stabilize for

10 Min)

• Measure Voltage across a known Valued Resistor (1K Ohm)

• Calculate DCL = V/R

Initial ESR Measurement @ 25°C

• Using an Agilent 4263B LCR Meter and a Kelvin connection

• Measure at frequency of 1000 Hz

• Measurement Voltage of 10mV

DC ESR Measurement

• Six steps capacity and ESRDC Test Method is used as illus-

trated in the figure right.

• Tests are carried out by charging and discharging the capacitor

for two cycles at rated voltage and half rated voltage

Maximum Operating Current

• This is the maximum current when capacitor temperature rise

of the capacitor during its operation is less than 15°C

Maximum Peak Current

• This is the maximum current in less than 1 sec

Watt Density

Energy Density

• Energy density = (½ CV²) / (3600*mass)

SCM Series

Series-Connected SuperCapacitor Modules

9