DC/DC Converter
WARNING: This page is about a different car, the 2012 Infiniti M35h. However, it is still accessible from the selected car via links, so may be relevant.
The DC/DC converter is installed on the Li-ion battery, and contains the pre-charge relay and resistor.
It reduces the high-voltage DC voltage from the Li-ion battery to DC voltage of approximately 13 V, and supplies this voltage to the on-board electrical equipment and also uses it to charge the 12V battery. In addition, it changes the output voltage according to HPCM signals so that appropriate voltage is supplied depending on the vehicle condition.