초록 ▼

A single dual-voltage battery capable of powering an automobile system having electrical equipment that requires different supply voltage. The battery allows idle stop, assisted drive and regeneration to be performed more efficiently by cooperative control of a controller and a DC/DC converter. Comm

A single dual-voltage battery capable of powering an automobile system having electrical equipment that requires different supply voltage. The battery allows idle stop, assisted drive and regeneration to be performed more efficiently by cooperative control of a controller and a DC/DC converter. Commonly performed external powering and starting can also be carried out if the battery has expired. The single dual-voltage battery is obtained by equipping a 12-V battery with a 24-V battery of a different type and adapted to supply power to respective electrical components. The 12-V battery unit is provided with a charging controllable DC/DC converter or downverter. The ancillary battery condition is monitored and controlled. External powering and starting is facilitated by using an ultracapacitor as the ancillary battery. The battery can be used with a single relay.

대표청구항 ▼

[ What is claimed is:] [1.]1. A vehicle drive system comprising:an engine;an engine drive shaft driven by said engine and a motor;a first controller operatively associated with said motor to operate said motor in one of a drive, regenerating, or power generating mode;a main battery supplying voltage

[ What is claimed is:] [1.]1. A vehicle drive system comprising:an engine;an engine drive shaft driven by said engine and a motor;a first controller operatively associated with said motor to operate said motor in one of a drive, regenerating, or power generating mode;a main battery supplying voltage to said motor to drive said motor, said main battery having a first power supply supplying a first voltage and a second power supply supplying a second voltage for an electrical load, said second voltage being of a lower value than said first voltage;a DC/DC converter connected between said second power supply and said first controller, said DC/DC converter controlling the voltage supplied to said second power supply such that said second power supply supplies said second voltage for said electrical load constantly; anda second controller connected to said DC/DC converter, said second controller switching on or off the DC/DC converter and causing said first controller to operate said motor in one of said drive, regeneration, or power generation mode.