Charging system

A charging system that charges a plurality of power storage modules that form a power storage device, comprising:

• an AC power source;
• a plurality of rectifiers that are connected between the AC power source and each of the plurality of power storage modules, and supply DC power obtained by rectifying AC power supplied from the AC power source to the plurality of power storage modules;
• and
• a plurality of current cutoff units that are connected between each of the plurality of power storage modules and each of the plurality of rectifiers, and automatically switch between conduction and cutoff of a current between the plurality of power storage modules and the plurality of rectifiers according to the AC power input to each of the plurality of rectifiers,
• wherein each of the plurality of current cutoff units includes
• a switch unit that is connected between the power storage module and the rectifier and includes at least one switching element, and
• a drive unit that is connected between an AC input end of the rectifier and a control terminal of the switch unit and generates a control signal for switching between closing and opening of the switch unit according to the AC power input to the AC input end, and
• wherein the drive unit includes
• a capacitor connected to the AC input end,
• a rectifier circuit connected to the capacitor, and
• a discharge resistor connected between the rectifier circuit and the switch unit.