R&D of Power Storage System with Electric Double-Layer Capacitors

An invention of the new physical battery called ECS (Energy Capacitor System) composed from specially made capacitors and electronic circuits, has opened up profound applications and possibilities. Copernican revolution indesign of energy storage capacitors is provided by trading off their internal resistance with energy density, and by charging slowly as to obtain better efficiency. Many problems inherent to capacitors such as inefficient charging, wide variation of terminal voltage and unequal distribution of voltage to each capacitors have been solved by attached electronic cirCapacitors for the system are also specially developed. With the electronic circuits, capacitors accommodate the energy density of 10Wh/1 at 2ΩF (ohms for each farad) and 18 Wh/1 at 108ΩF. Various applications are tested ranging from solar system to home air conditioner. Power load leveler is supported by Japanese national project, a 3kWh system is built and resulted 85% AC to AC, 95% DC to DC efficiency together with record cell energy density of 27 Wh/l. A 15ton Hybrid bus powered by a 75kW ECS with a 75kW generator produced and resulted almost twice improvements of fuel mileage.