Abstract: A connection-switched capacitor storage system comprises plural capacitors, parallel monitors connected with the capacitors, respectively, switches for switching the connections of the capacitors from a series combination to a parallel combination or vice versa, and a control portion. The parallel monitors bypass the charging current for the capacitors when the terminal voltages of the capacitors exceed a given voltage, thus limiting increases of the terminal voltages of initializing the terminal voltages of the capacitors to their original level. The control portion controls initialization and switching of the connections of the capacitors. The control portion causes the parallel monitors to initialize the capacitors near the voltage at which the connections of the capacitors are switched by the switches.
Abstract: An electrical storage capacitor system that efficiently initializes itself to its initial state during pause intervals between charging/discharging cycles of operation without providing any special initializing cycles. The capacitor system comprises capacitors connected in series to store electricity, a variation decision means for judging the amount of variation in amount of charge between the capacitors, an operation decision means for judging whether the capacitors are being charged or discharged, and a initializing charging means for charging the capacitors to initialize themselves to their initial state according to the results of decisions made by the variation decision means and by the operation decision means.
Abstract: There is disclosed a power supply system comprising capacitors that are connected switchably via a small number of switches to decrease variations of an output voltage. The switches comprise a series connection switch and first and second sets of switches. A control means controls the first set of switches, the second set of switches, and the series connection switch to switch connection of the capacitors of the first and second sets among a first state in which the first set of capacitors is connected in series with the second set of capacitors, a second state in which the first set of capacitors is connected in parallel with the second set of capacitors, and a third state in which one or more capacitors of the first set are connected in parallel with one or more capacitors of the second set.
Abstract: There is disclosed an electrical storage capacitor system that performs initializing charging and storage charging for energy storage with reduced energy loss. The capacitor system comprises capacitors connected in series, comparators for comparing the voltages developed across the capacitors with a first reference value, voltage limitation means connected in parallel with the capacitors to limit the voltages of the capacitors to a second reference value during initializing charging, and a charger. During initializing charging, the capacitors are charged while operating the voltage limitation means. Storage charging for energy storage is done according to the output signals from the comparators until the voltage of any one of the capacitors reaches the first reference value.
Abstract: There is disclosed a capacitor module capable of having an improved packing density and, hence, an improved energy storage density. A capacitor bank using such capacitor modules is also disclosed. Furthermore, an electrical energy storehouse using such capacitor banks is disclosed. Supercapacitor cells connected in series are housed in a box-like capacitor module. A heat dissipator is mounted on an end surface of the module. Parallel monitors connected in parallel with the capacitor cells, respectively, are mounted to the heat dissipator. Such capacitor modules are stacked to form a capacitor bank. The heat-dissipating surface of each module is located on the outside of the bank and exposed. The modules are held in the bank so that they can be taken out of the bank individually. Capacitor banks making a pair are located back-to-back such that their heat-dissipating surface face outward.