Abstract: A power supply device is mountable to a vehicle and includes: a high-voltage battery; a low-voltage battery of which an output voltage is lower than that of the high-voltage battery, and which can be charged by output power from the high-voltage battery; and a control unit configured to perform charging/discharging control for the high-voltage battery and the low-voltage battery. The control unit performs feeding control for causing the high-voltage battery to supply power to a predetermined on-vehicle device while consumed power is higher than a predetermined value in a state in which a main switch of the vehicle is not on.

Abstract: A power supply device is mountable to a vehicle and includes: a high-voltage battery; a low-voltage battery of which an output voltage is lower than that of the high-voltage battery, and which can be charged by output power from the high-voltage battery; and a control unit configured to perform charging/discharging control for the high-voltage battery and the low-voltage battery. The control unit performs feeding control for causing the high-voltage battery to supply power to a predetermined on-vehicle device while consumed power is higher than a predetermined value in a state in which a main switch of the vehicle is not on.

Abstract: A power supply device is mountable to a vehicle and includes: a high-voltage battery; a low-voltage battery of which an output voltage is lower than that of the high-voltage battery, and which can be charged by output power from the high-voltage battery; and a control unit configured to perform charging/discharging control for the high-voltage battery and the low-voltage battery. The control unit performs feeding control for causing the high-voltage battery to supply power to a predetermined on-vehicle device while consumed power is higher than a predetermined value in a state in which a main switch of the vehicle is not on.

Abstract: A vehicular electric power supply system that is mounted in a vehicle includes: a load is configured to be supplied with electric power from one or both of a first-series electric power supply line and a second-series electric power supply line that are provided independently of each other; a first battery; a second battery; and a connection control device is configured to control connection of the first battery and the second battery to the first-series electric power supply line and the second-series electric power supply line, based on a state of the vehicle.

Abstract: A power supply device is mountable to a vehicle and includes: a high-voltage battery; a low-voltage battery of which an output voltage is lower than that of the high-voltage battery, and which can be charged by output power from the high-voltage battery; and a control unit configured to perform charging/discharging control for the high-voltage battery and the low-voltage battery. The control unit performs feeding control for causing the high-voltage battery to supply power to a predetermined on-vehicle device while consumed power is higher than a predetermined value in a state in which a main switch of the vehicle is not on.

Abstract: A vehicular electric power supply system that is mounted in a vehicle includes: a load is configured to be supplied with electric power from one or both of a first-series electric power supply line and a second-series electric power supply line that are provided independently of each other; a first battery; a second battery; and a connection control device is configured to control connection of the first battery and the second battery to the first-series electric power supply line and the second-series electric power supply line, based on a state of the vehicle.

Abstract: An engine non-stop warning apparatus for a vehicle provided with an engine stop control section configured to stop an engine on condition that a stop switch is continuously pressed for a specified time duration during operation of the engine includes an engine stop determination section configured to determine whether or not the engine is going to stop or stopping by the lapse of the specified time duration after the stop switch is pressed during the operation of the engine, and an engine non-stop warning section configured to warn a vehicle user that the engine is not stopping in a case the engine stop determination section determines that the engine is not going to stop or stopping by the lapse of the specified time duration after the stop switch is pressed during the operation of the engine.

Abstract: An engine non-stop warning apparatus for a vehicle provided with an engine stop control section configured to stop an engine on condition that a stop switch is continuously pressed for a specified time duration during operation of the engine includes an engine stop determination section configured to determine whether or not the engine is going to stop or stopping by the lapse of the specified time duration after the stop switch is pressed during the operation of the engine, and an engine non-stop warning section configured to warn a vehicle user that the engine is not stopping in a case the engine stop determination section determines that the engine is not going to stop or stopping by the lapse of the specified time duration after the stop switch is pressed during the operation of the engine.