Sirius Capacitor Module
–
User Manual
Model Number - 3550-48-B-1.7C-M-SD-A-G
This manual is subject to change without notice and at the sole discretion of Kilowatt Labs, Inc.
Kilowatt Labs, Inc. |
32
13.2
ESR, Terminal Resistance and Internal Resistance:
The Supercapacitor can be represented by a simple RC equivalent circuit as illustrated below:
Where the voltage between the two terminals of the supercapacitor is:
𝑽
𝟏
= 𝑽
𝑹𝟏
+ 𝑽
𝑪𝟏
(𝟏)
During constant current charge and discharge:
𝑽
𝟏
= 𝑰 ∗ 𝑹 + 𝑽
𝑪𝟏
(𝟐)
𝑹 =
𝑽
𝟏
− 𝑽
𝑪𝟏
𝑰
(𝟑)
≈
•
It can be seen from the graph that as discharge
current rate is increased, the time required to
discharge the Module is decreased.
•
Similar to Module charge graph, also while
discharging, there is dramatic voltage decrease
from 53V to 50V in less than 9 minutes
regardless of discharge current rate. Between
50V to 44V there is linear behavior in all
discharge voltage curves.
Regarding the discharge test with 4
different
current
rate,
ambient
temperature reaches the maximum value
when Module is fully discharged and
there is quite correlation between
consumed energy and Module ambient
temperature. Temperature
increase
window is 5 Celsius.
