Final year project : Ultracapacitor for Peak Power Loads

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Final year project Ultracapacitor for Peak
Power Loads

• by Chanwoo Kwon

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Benefit of Ultracapacitor

• Reliable operation in harsh environments
• Virtually maintenance free
• Tailored solutions
• Competitively priced
• Exceptional efficiency
• Compact design
• Extended operating life
• Environmentally safe

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Various Energy-Storage Devices
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Battery and Ultracapacitor

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Lead Acid Battery Ultracapacitor
Specific Energy Density (wh/kg) 10-100 1-10
Specific Power Density (w/kg) lt1000 lt10,000
Cycle Life 1,000 gt500,000
Charge/Discharge Efficiency 70-85 85-98
Fast Charge Time 1-5hr 0.330sec
Discharge Time 0.3-3hr 0.330sec
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Hybrid System
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Milestones 1

• Review of Ultrcapacitors
• Physical construction and operation of
  ultrcapacitors
• Application of ultracapacitors in energy storage
  for automotives and renewable energy sytems
• Electrical characteristics and equivalent
  circuits of ultracapacitors
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Milestones 2

• DC-DC Converter
• Select and design a dc-dc converter to charge the
  ultrcapacitor from a small 12 V battery (size the
  battery for the application)
• Select a dc motor with high starting current for
  the application
• Simulate the converter in PSICE
• Use MATLAB/Simulink to model the complete system
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Milestones 3

• Demonstrate the application with the battery,
  ultracapacitor, dc-dc converter and motor
• Identify the parameters that would be important
  in optimising the overall system
• Build and test the complete system