| 摘要 |
The present invention relates to a charging device for storing electric energy in a plurality of electrical double layer capacitors, comprising a power source circuit, a capacitor bank having a plurality of capacitors, a control circuit for switching an interconnection state of the plurality of capacitors, and a voltage monitor circuit for monitoring a charged voltage in the plurality of capacitors, which repetitively carries out a step of performing a charging operation by switching the plurality of capacitors in the capacitor bank to a serial connection state, and a step of monitoring a charged voltage by using a voltage monitor circuit by switching the plurality of capacitors to a parallel connection state until the charged voltage reaches a predetermined value. By connecting the plurality of capacitors in series when charging the same, the power source circuit can be downsized as the charging current is reduced, and by connecting the same in parallel when monitoring the voltage, each capacitor can be charged equally as a voltage in each capacitor is leveled. Further, because the voltage monitor circuit can be a single circuit, not only can the size and cost of the charging device be reduced significantly, but also a heat quantity generated from the voltage monitor circuit can be suppressed markedly, thereby making it possible to
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