Electronics Engineering Herald                 
Home | News | New Products | India Specific | Design Guide | Sourcing database | Student Section | About us | Contact us | What's New
Processor / MCU / DSP
Memory
Analog
Logic and Interface
PLD / FPGA
Power-supply and Industrial ICs
Automotive ICs
Cellphone ICs
Consumer ICs
Computer ICs
Communication ICs (Data & Analog)
RF / Microwave
Subsystems / Boards
Reference Design
Software / Development kits
Test and Measurement
Discrete
Opto
Passives
Interconnect
Sensors
Batteries
Others


Design guide

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

Events
Advertise
Send News
Send Article
Feedback
eeherald.com
India Search
Electronics Design Business
Home | News | New Products | India Specific | Design Guide | Sourcing database | Student Section | About us | Contact us | What's New
©2006 Electronics Engineering Herald