6

SCC Series

High Capacitance Cylindrical SuperCapacitors

TDS-SC-0001 | Rev 1

TEST METHODS

IEC CAPACITANCE TEST METHOD

Procedure:

Charge module under constant current to rated voltage at room temperature, then hold 10 minutes on charge under constant voltage. After

10 minutes, discharge under constant current (as shown in chart below), recording voltage at V

1, V2, and time intervals at t1 and t2. Use the

capacitance formula to determine cap value.

30 min

VR

V1

V2

t2

t1

Voltage

(V)

Time (s)

V3 ESR Drop

10 min

DC ESR MEASUREMENT

A six-step ESR

DC test method is illustrated to the

right and carried out as follows:

• Rest 10 Seconds

• Charge under constant current (I

1) to rated voltage (VR)

• Rest 5 seconds

• Rest 10 seconds, record V

3 and t4

• Discharge under constant current (I

2) to half rated voltage,

Record I

2, V4, And t5

• Rest 2 seconds, record V

5 And t6

Repeat steps 1-6 recording I, V, And t accordingly, finally discharging to

below 0.1V under constant current (I

2).

Formulas to calculate:

• Two cycle discharge capacitances:

• Discharge capacitance:

• Two cycle discharge DC ESR:

• Discharge DC ESR:

Note: I

1 = I2 = 75mA/F, the rated capacitance in the chart means discharge capacitance, and DC ESR (ESRDC) means discharge DC resistance.

50% VR

VR

I – Discharge Current, 4 × C × V

R (mA)

V

R – Rated Voltage (V)

V

1 – Initial Test Voltage, 80% Of VR (V)

V

2 – Final Test Voltage, 40% Of VR (V)

t

1 – Initial Test Time (s)

T

2 – Final Test Time (s)

C =

I × (t

2 − t1)

V1 - V2

C

dch1 = I2 ×

(t

5 − t4)

; C

dch2 = I2 ×

(t

11−t10 )

V

3 - V4

(V

9−V10 )

C

dch =

(C

dch1 + Cdch2)

2

ESR

dch1 =

(V

5 −V4)

;ESR

dch2=

(V

11 −V10)

I

2

I

2

ESR

dch =

(ESR

dch1+ ESRdch2)

2

– supercapacitors –

The Important Information/Disclaimer is incorporated in the catalog where these specifications came from or available

online at www.kyocera-avx.com/disclaimer/ by reference and should be reviewed in full before placing any order.