Patent ID: 8437910
Filing Date: 2013-05-07
Classification: B60R,H02J,H02M,Y02T

Abstract:
1. An automotive electric power supply system comprising: an alternator that is driven by an engine to generate alternating-current electric power; a rectifier that rectifies said alternating-current electric power that is generated by said alternator to output direct-current electric power; a first DC/DC converter that is connected by alternator wiring to a higher-voltage output terminal of said rectifier, and that converts a voltage value of an output voltage of said rectifier to output a different direct-current voltage; a first electricity storage apparatus that is connected by load wiring to said first DC/DC converter, and that supplies electric power to a load; a second DC/DC converter that is connected by alternator wiring to a higher-voltage output terminal of said rectifier, and that converts a voltage value of an output voltage of said rectifier to output a different direct-current voltage; a second electricity storage apparatus that has an electricity storage capacity that is less than said first electricity storage apparatus, and that is connected to said second DC/DC converter; a regulator circuit that is connected to said alternator wiring or said load wiring, and that supplies a field current to a field winding of said alternator; and a controlling circuit that controls driving of said first DC/DC converter and said second DC/DC converter to store said output direct-current electric power from said rectifier in said first electricity storage apparatus and said second electricity storage apparatus, wherein said second DC/DC converter is constituted by a bidirectional DC/DC converter.