MODULAR HIGH PRECISION CHARGER/DISCHARGER SUBRACK ASSEMBLY STRUCTURE

The present disclosure relates to a technical idea for efficiently using space of a power supply unit of a charging/discharging system by facilitating arrangement and design in a unit module. A modular high-precision charger/discharger sub-rack assembly structure includes: a base plate fixed in a state of being vertically erected to a sub-rack of a high precision charger/discharger; and at least one charger/discharger power supply unit or electrically or physically detachably attached to one surface of the base plate, configured to perform charging or discharging through bi-directional AC-DC conversion or bi-directional DC-DC conversion between a battery and a power source, including constituent circuits arranged in a first direction to have an elongated shape in the first direction and to perform charging or discharging, and arranged in parallel in a second direction perpendicular to the first direction on the base plate.