抄録
Storage batteries or pumped power stations have been used for storing the electric power. However, there are some problems on storage batteries, such as long charging time, limited cycle life, low coulomb efficiency and inaccurate residual power meter. Because of the facts, practical power applications are not yet prevailed.
To solve those problems, a complex system of capacitors and electronic circuits named ECS (energy capacitor system) is proposed. The capacitor part of the ECS is a group of electric double-layer capacitors of increased energy density. The circuits part is built around switching regulators. Though the capacitors alone are not capable of delivering stable output, the accompanied circuits compensate the various characteristics all through the charge- and discharge-cycle.
Combined together, the energy density is to be increased about 16 times from the conventional electric double-layer capacitors to almost the level of lead acid batteries, with low enough output resistance and better voltage stability. Other than the energy density, the ECS inherently features short charging time, very long cycle life, good coulomb efficiency. The cells are completely sealed, made from inexpensive materials that may not be harmful to the environment.
