Patent ID: 7936149

Claim:
A charging device comprising: an electric accumulator formed by a plurality of series-connected electric accumulator cells, one electrode of any one of the electric accumulator cells being used as a reference potential of the electric accumulator; at least one capacitor having one end fixed to the potential of one electrode of each of the electric accumulator cells or fixed to the potential of the other electrode of any one of the electric accumulator cells through a rectifying means; and a periodical power source connected between the capacitor and the reference potential of the electric accumulator to generate repetitive signals, wherein the periodical power source includes a first periodical power source and a second periodical power source which has an inverted phase with respect to the first periodical power source, and wherein the capacitor includes a first capacitor and a second capacitor, the other end of the first capacitor being fixed to the voltage of the first periodical power source and the other end of the second capacitor being fixed to the voltage of the second periodical power source.