Ultracapacitors: Do your power supply design need sudden and short high power of energy which your batteries or other power source not capable of taking the load. Just have a look at using ultracapacitors. Ultracapacitors are suitable for many such power supply applications.
Ultracapacitor are new generation storage capacitors where the distance between electrodes is at nano meter level. They can store and release the electrical energy just like batteries but offers some specific advantage over batteries, i.e. exactly the solutions for the battery related problems you are facing.
Have a look at this comparison table of ultracaps v/s various batteries
| |
Lead |
NiCd |
NiMH |
Specific
energy
(Wh/kg)* |
30-50 |
45-80 |
60-110 |
| Max Power Density |
700 Watts |
800 Watts |
900 Watts |
| Total no. of effective charge/discharge Cycles |
500 |
1500 |
1000 |
| Charging Time |
6 to 8 hours |
1 hour |
2 - 4 hours |
| Temperature withstanding |
Performance degrades at cold weather |
Better peformance at cold but still varies |
Wide variation of performance with temperature |
| Weight/1KWH |
20 kg |
12 kg |
10 kg |
| Sudden Load |
5 times AH rating |
20 times AH rating |
5 times AH rating |
| Cost |
Low |
Low |
Medium |
| |
Li-ion |
Li--polymer |
Utra
Capacitor |
Specific
energy
(Wh/kg)* |
150-190 |
150-190 |
1
- 5 |
| Max Power
Density |
1500 Watts |
250 Watts |
100
KWatts |
| Total
no. of effective charge/discharge Cycles |
500 |
500 |
30,000 |
| Charging
Time |
2 - 4 hours |
2 - 4 hours |
In
few seconds |
| Temperature
withstanding |
Performance
varies to some extent |
Performance
degrades at cold weather |
Best
Temperature withstanding |
| Weight/1KWH |
6 kg |
6 kg |
<100
gms |
| Sudden
Load |
2 times
AH rating |
2 times
AH rating |
upto
100 A |
| Cost |
High |
High |
High |
|
