公开(公告)号：US20230134343A1

公开(公告)日：2023-05-04

申请号：US17970671

申请日：2022-10-21

Applicant: Mazda Motor Corporation

Inventor： Masato ISHIBASHI ,  Takeshi MATSUKAWA ,  Shinsuke YOSHITAKE ,  Daisuke HAMANO ,  Shingo HIROSE ,  Keita YOSHIDA

IPC: B60L58/20 ,  B60R16/033 ,  H02J7/00

Abstract: A vehicle power supply system includes a first secondary battery, a second secondary battery whose output voltage is lower than that of the first secondary battery, a power conversion device configured to convert an input AC voltage into a DC voltage and output the DC voltage, a battery pack configured to receive the DC power output from the power conversion device and charge the first secondary battery, DC/DC converters configured to step down an input DC voltage to output the stepped-down DC voltage, and a power control unit configured to control the battery pack. The first secondary battery is connected to input ports of the DC/DC converters via the battery pack. An output port of the DC/DC converter is connected to a video media control unit, and the DC/DC converter is provided separately from the video media control unit. An output port of the DC/DC converter is connected to the second secondary battery.