Power supply system

A power supply system in a vehicle having an idling stop function for executing an automatic stop and an automatic restart on an engine, the power supply system comprising:

• a power generator;
• a first storage unit that can be charged with and can discharge generated power generated by the power generator;
• a second storage unit that can be charged with and can discharge the generated power;
• two paths connecting the first storage unit and the second storage unit;
• a switching unit including a first switch for switching one path of the two paths between a conductive condition and a non-conductive condition, and a second switch for switching another path of the two paths between a conductive condition and a non-conductive condition;
• an engine restarter connected to either the first storage unit side or the second storage unit side of the switching unit in order to start the engine during the automatic restart;
• an electrical load of the vehicle, which is connected to the first storage unit side of the switching unit;
• and
• a controller configured to implement ON/OFF control on the first switch and the second switch,
• wherein the controller switches the second switch to the non-conductive condition when deceleration regeneration is underway in the vehicle, and
• wherein the controller switches both the first switch and the second switch to the conductive condition for an entirety of a first period during which the engine is stopped during the idling stop, and for an entirety of a second period during the engine is operative except for both a starting stage of the automatic restart and the deceleration regeneration, whereby discharge from the second storage unit to the electrical load is performed using both of the two paths.

A power supply system in a vehicle having an idling stop function for executing an automatic stop and an automatic restart on an engine, the power supply system comprising:

• a power generator;
• a first storage unit that can be charged with and can discharge generated power generated by the power generator;
• a second storage unit that can be charged with and can discharge the generated power,
• two paths connecting the first storage unit and the second storage unit;
• a switching unit including a first switch for switching one path of the two paths between a conductive condition and a non-conductive condition, and a second switch for switching another path of the two paths between a conductive condition and a non-conductive condition;
• an engine restarter connected to either the first storage unit side or the second storage unit side of the switching unit in order to start the engine during the automatic restart;
• an electrical load of the vehicle, which is connected to the first storage unit side of the switching unit;
• and
• a controller configured to implement ON/OFF control on the first switch and the second switch,
• wherein the power generator is disposed on the second storage unit side of the switching unit,
• wherein the controller switches the first switch to the non-conductive condition when deceleration regeneration is underway in the vehicle, and
• wherein the controller switches both the first switch and the second switch to the conductive condition for an entirety of a first period during which the engine is stopped during the idling stop, and for entirety of a second period during which the engine is operative except for both a starting stage of the automatic restart and the deceleration regeneration, whereby discharge from the second storage unit to the electrical load is performed using both of the two paths.