Vehicular power supply system

摘要

A vehicular power supply system is provided in which the interior of a waterproof case is partitioned into a first cooling air passage on the lower side and a second cooling air passage on the upper side, a battery module is cooled with cooling air that is introduced from an intake passage part of a duct member and flows through the first cooling air passage on the lower side, and high voltage electrical components are then cooled by guiding the cooling air to the second cooling air passage on the upper side via an intermediate duct.