Patent ID: 8319375

Claim:
A power supply system, comprising: a first plurality of power supply units configured to supply working voltages from a battery to a second plurality of loads; a large-capacitance capacitor configured to charge electric charges from the battery; a third plurality of switching means for connecting the large-capacitance capacitor to the second plurality of loads selectively; control means for switching the third plurality of switching means corresponding to at least one load presently in use among the second plurality of loads; voltage monitoring means for monitoring a voltage of the large-capacitance capacitor; and discharge means, in a case where an output voltage of the large-capacitance capacitor monitored by the voltage monitoring means is found higher than an operating voltage of the second load when the large-capacitance capacitor is switched from a first load to a second load, for discharging charges stored in the large-capacitance capacitor according to a control by the control means so that a voltage of the large-capacitance capacitor decreases to the operating voltage before connection to the second load.