NESSCAP® Ultracapacitor Products
Technical Info.
1.
The Measurement Condition
1-1 Capacitance
1) Constant current charge with 10mA/F to VR
2) Constant voltage charge at VR for 5min
I x ( T2 - T 1 )
C =
V1 – V2
Where C
Voltage (V)
3) C
Constant
t t currentt di
discharge
h
with
ith 10
10mA/F
A/F to
t 0.1V
0 1V
is the capacitance (F) ;
VR
5 min
V1
V2
I
is the discharge current (A);
VR
is the rated voltage (V)
V1
is the measurement starting voltage, 0.8ⅹVR (V);
V2
is the measurement end voltage, 0.4ⅹVR (V);
T1
is the time from discharge start to reach V1(s);
T2
is the time from discharge start to reach V2(s) .
Time
T1
T2
1-2 ESRAC
1) ESRAC is measured by 4-probe impedance analyzer at the following conditions.
- Condition : Potentiostat mode
AC Amplitude : 5mV
Frequency : 1kHz, 100Hz
1-3 ESRDC
2) Constant voltage charge at VR for 5min
VR
3) Constant current discharge to 0.1V
Voltage (V)
1) Constant current charge to VR
∆V
Rd =
Where Rd
I
∆V
is the ESRDC ((Ω);
);
∆V is the voltage drop for 10ms (V);
I
5 min
i
Time
is the discharge current (A).
1-4 Leakage Current
1) The capacitor is charged to the rated voltage at 25℃.
2) Leakage current is measured after 72 hours by current measurement equipment.
※ Life time is provisional value
© NESSCAP 2008. All Rights reserved. Design, Specifications are subjected to change without notice.
Nesscap Co., Ltd.
(446-901) 750-8, Gomae-dong, Giheung-gu, Yongin-si, Gyeonggi-do, Korea
Tel: +82-31-289-0721 Fax: +82-31-286-6767 e-mail: marketing@nesscap.com
www.nesscap.com
ISO 9001, ISO 14001, TS 16949
NESSCAP® Ultracapacitor Products
Technical Info.
2. Technical Information
1) Definition of Max Current
- Current for 1sec discharge from the rated voltage to the half of it in constant current discharge,
IMAX (A) =
Where △t
C
Rd
VR
1/2 VR
△ t / C + Rd
is the discharge time (sec), 1 sec in this case ;
is the capacitance (F);
is the ESRDC (Ω);
is the rated voltage (V).
2) Definition of Max Stored Energy
EMAX (Wh) =
½ CVR2
3600
Gravimetric Specific Energy ( Wh / kg ) =
EMAX
Weight
※ Life time is provisional value
© NESSCAP 2008. All Rights reserved. Design, Specifications are subjected to change without notice.
Nesscap Co., Ltd.
(446-901) 750-8, Gomae-dong, Giheung-gu, Yongin-si, Gyeonggi-do, Korea
Tel: +82-31-289-0721 Fax: +82-31-286-6767 e-mail: marketing@nesscap.com
www.nesscap.com
ISO 9001, ISO 14001, TS 16949