Ultracapacitor

porducts list

Alarm [4]
Industrial Metal Detectors [9]
Other Measuring & Analysing Instruments [7]
Other Security & Protection Products [3]
Security Services [7]
Self Defense Supplies [5]

contact datails

Shell Carbon Division Co.,Ltd

+65 6224 3229

Ultracapacitor


company	Shell Carbon Division Co.,Ltd
Categories	Battery Packs
Update	2011-05-19
Original Region	China
prev 1 2 3 4 5 6 7 8 9 10 next

Ultracapacitor

Shell Carbon's activated carbon for ultracapacitor products are the world's leading high-performance production ultracapacitors. The quality is the most important to its capability.

It is warehouse with high electric energy, it elasticize speedy within 15 minutes. It will not overcharge, the electric energy is in high effect more than 95% as compare to commonly accumulator only 70%. The product have advantage of long shelf-life, charge and discharge range 30-1000 thousands times longer.

Operate more reliably in high- and low-temperature conditions, require far less maintenance and reduce environmental issues associated with battery disposal. Extremely high electrical energy storage capacity and the ability to deliver bursts of high power and recharge rapidly from any energy source over hundreds of thousands of cycles make our ultracapacitors an ideal solution for a wide variety of applications.

With the extensive research & development, we successfully developed activated carbon for ultracapaitor for various industries. Ultracapacitors are widely used in the field of power, transportation, finance, communications and the military affair, etc. The great value of the actual applications provide a new energy storing means, which is highly efficient, low cost, and environment protecting, on the industrial production, social life and national defense.

The postage stamp-size small cell ultracapacitors extend battery life and enhance the performance and functionality of hand-held electronic devices, remote transmitting devices and toys.

Large cells are also available and can be linked together to form power packs of up to 500 cells to power initial acceleration, operate electrical subsystems and recapture energy from braking for cleaner, more fuel-efficient hybrid electric/internal combustion buses, trucks and automobiles. Shell Carbon offers several integrated module and pack solutions that are available with active or passive voltage balancing.

Working with system integrators and OEM partners, Shell Carbon Technologies can create solutions that can take full advantage of the ultracapacitor key characteristics:

High reliability and cycle life 100,000 cycles plus
Rapid recharge capability within minutes
High power density
Wider temperature range versus batteries
No maintenance

Characteristics

Capacitors store energy in an electrostatic field rather than as a chemical state as in batteries.
No chemical actions involved which means very long cycle life is possible.
No limit on the cell voltage imposed by the "cell chemistry" as with gavanic cells.
The terminal voltage directly proportional to the State of Charge (SOC) which limits range of applicability somewhat.

Low power capacitors

Capacitors are probably the most common form of non-chemical energy storage and are widely used in low power applications.

Typical specification: 20 F to 2 Farads 5.5 to 6.3 Volts

Supercapacitors or Ultracapacitors as they are also called, look very much like batteries. They have a low energy density of less than 15 Wh/Kg but very high power density 4,000 W/Kg. Voltage equalization to spread the available charge evenly between the capacitors in a series chain may also be needed for many applications.

Typical specification for automotive applications: 10 to 200 Farads 100 Volts

Advantages

Cell voltage determined by the circuit application, not limited by the cell chemistry.
Very high cell voltages possible (but there is a trade-off with capacity)
High power available
High power density
Simple charging methods. No special charging or voltage detection circuits required.
Very fast charge and discharge. Can be charged and discharged in seconds.
Can not be overcharged.
Long cycle life of more than 500,000 cycles at 100% DOD.
No chemical actions.
10 to12 year life
Low impedance

Shortcomings

Linear discharge voltage characteristic prevents use of all the available energy in some applications.
Power only available for a very short duration.
Low capacity.
Low energy density.
Cell balancing required for series chains.
High self discharge rate. Much higher than batteries.