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  • Super Capacitors  and Ultracapacitors - New Super Energy Storage
    fully charged but dry and feed off bodily fluids to allow it to re power and discharge energy The future of the battery is here What are the Advantages of a Super Capacitor Virtually unlimited life cycle cycles millions of time 10 to 12 year life Low impedance Charges in seconds No danger of overcharge Very high rates of charge and discharge High cycle efficiency 95 or more Super capacitors and ultra capacitors are relatively expensive in terms of cost per watt SuperCapacitor Disadvantages Linear discharge voltage prevents use of the full energy spectrum Low energy density typically holds one fifth to one tenth the energy of an electrochemical battery Cells have low voltages serial connections are needed to obtain higher voltages Voltage balancing is required if more than three capacitors are connected in series High self discharge the rate is considerably higher than that of an electrochemical battery Requires sophisticated electronic control and switching equipment Supercapacitors or UltraCapacitors were initially used by the US military to start the engines of tanks and submarines Most applications now are in small appliances handheld electronics and hybrid electric vehicles NASA has a research project to use supercapacitors in an electric bus called the Hybrid Electric Transit Bus The energy used to start the engine and accelerate the bus is regenerated from braking During test runs a bus loaded with 30 supercapacitors each of them weighing 32 kg and releasing energy of 50 kJ at 200 V managed to run for four miles In most hybrid vehicles 42 V super capacitors are used General Motors has developed a pickup truck with a V8 engine that uses the supercapacitor ultra capacitor to replace the battery The efficiency of the engine rose by 14 The supercapacitor supplies energy to the alternator Toyota has developed a

    Original URL path: http://www.supercapacitors.org/ (2016-02-11)
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  • Ultracapacitors & Supercapacitors - A new way of life...
    efficiently capturing electricity from regenerative braking and can deliver power for acceleration just as quickly With no moving parts they also have a very long lifespan probably longer than any car A super capacitor is also known as a double layer capacitor It polarizes an electrolytic solution to store energy electro statically Though it is an electrochemical device no chemical reactions are involved in its energy storage mechanism This mechanism is highly reversible and allows the ultra capacitor to be charged and discharged hundreds of thousands of times A super capacitor can be viewed as two non reactive porous plates or collectors suspended within an electrolyte with a voltage potential applied across the collectors In an individual supercapacitor cell the applied potential on the positive electrode attracts the negative ions in the electrolyte while the potential on the negative electrode attracts the positive ions A dielectric separator between the two electrodes prevents the charge from moving between the two electrodes Diagram 2 depicts an supercapacitor its modules and an supercapacitor cell Once the supercapacitor is charged and energy stored a load the vehicle s motor can use this energy The amount of energy stored is very large compared to a

    Original URL path: http://www.supercapacitors.org/howtheywork.html (2016-02-11)
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  • Supercapacitors - A new way of life...
    functions as the primary power source and an electric power storage system that functions as the secondary power source The presence of the secondary power source allows designers to size the combustion engine for cruising power requirements The secondary source handles peak power demands for acceleration In addition the secondary source is used for capturing regenerative braking energy and applying that energy for further acceleration or for the basic energy needs of supplementary electrical systems Through this basic design structure HEVs promise to offer low maintenance clean operation and high fuel economy Hybrid cars are good for the environment They can reduce smog by 90 percent and they use far less gasoline than conventional cars Hybrid cars are economical They can get up to 55 to 60 mpg in city driving while a typical SUV might travel 15 20 miles per gallon or use three times as much gas for the same distance Hybrids are better than all electric cars because hybrid car batteries recharge as you drive so there is no need to plug in Also most electric cars cannot go faster than 50 60 mph while hybrids can How does a hybrid electric vehicle work THE HYBRID S ELECTRIC MOTOR The electric motor handles normal stop and go travel and initial highway acceleration The electric motor also assists the gas or diesel engine to reduce fuel consumption and emissions For example it is the electric motor that drives energy wasting accessories like the power steering pump and air conditioner THE HYBRID S GASOLINE MOTOR The gasoline or diesel powered internal combustion engine kicks in whenever the vehicle gets to higher speeds Hybrids have a sophisticated computer control system that decides when to switch from one power source to the other The gas or diesel engine also can generate

    Original URL path: http://www.supercapacitors.org/hybrid-electric-vehicle.html (2016-02-11)
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  • Supercapacitor Investment Companies & Articles
    answers market demands February 2006 Super Capacitors set for wind turbine duties February 2006 Super capacitors set for fuel cell duties January 2006 Supercapacitor users swap experiences December 2005 Super capacitor cells and packs are UL recognized October 2005 Super capacitors up the ante June 2005 Super capacitors to power Emergency Systems April 2005 USABC approves ultracapacitor energy storage March 2005 Capacitor packs provide powerful backup March 2005 Capacitor delivers

    Original URL path: http://www.supercapacitors.org/links.htm (2016-02-11)
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