In-vehicle control device

An in-vehicle control device for use in an in-vehicle system that is provided with:

• a power source unit for supplying power;
• a power storage unit that is different from the power source unit;
• a first power path to which power from the power source unit is supplied;
• and a second power path serving as a path for supplying power supplied from the first power path to a load, the in-vehicle control device being configured to control power supply from the power storage unit and comprising:
• a voltage conversion unit that is provided between the second power path and the power storage unit, and is configured to perform a first conversion operation of converting a voltage applied to a third power path provided on a second power path side and applying an output voltage to a fourth power path provided on a power storage unit side, and a second conversion operation of converting a voltage applied to the fourth power path and applying an output voltage to the third power path;
• a control unit configured to control the voltage conversion unit;
• and
• a first circuit element part capable of allowing a current to flow from the first power path to the third power path and interrupting a current flow from the third power path to the first power path,
• wherein the power storage unit includes a first power storage unit, and a second power storage unit located on a lower potential side than the first power storage unit and connected in series with the first power storage unit, and
• the in-vehicle control device further comprises a second circuit element part capable of allowing a current to flow from an intermediate conductive path between the first power storage unit and the second power storage unit to the second power path, and interrupting a current flow from the second power path to the intermediate conductive path.