Abstract-Electrochemical double layer capacitors (EDLC),
well known as ultra-capacitors have been used intensively in
power conversion applications such as controlled electric drives,
active fIlters, power conditioners and uninterruptible power
supplies. In such applications, an ultra-capacitor is used as a
short-term energy storage device that can be fully
charged/discharge within few seconds. This paper gives a
comprehensive procedure and guideline for selection and design
of ultra-capacitor module. Selection of main parameters, such as
voltage and capacitance rating, is discussed in details. Conversion
losses and efficiency as well as thermal design of the u1tracapacitor
module are also discussed. In last part of the paper,
design of voltage balancing circuit is addressed. At the end of the
paper, a design example is given and the experimental results
presented.