Patent ID: 8583307
Filing Date: 2013-11-12
Classification: B60K,B60L,B60W,H01M,Y02E,Y02T

Abstract:
1. A power supply system for an electrically powered vehicle mounted with a motor for generating power to drive the vehicle, comprising: a main power storage device; an electric power feeding line for supplying electric power to an inverter that controls and drives said motor; a first voltage converter provided between said electric power feeding line and said main power storage device and configured to convert voltage bidirectionally; a plurality of sub power storage devices provided in parallel to each other; a second voltage converter provided between said plurality of sub power storage devices and said electric power feeding line and configured to convert voltage between one of said plurality of sub power storage devices and said electric power feeding line bidirectionally; a connection unit provided between said plurality of sub power storage devices and said second voltage converter and configured to control connection and disconnection between said plurality of sub power storage devices and said second voltage converter; and a control device operative in a first mode for controlling said connection unit to connect a selected sub power storage device selected sequentially from said plurality of sub power storage devices to said second voltage converter and also disconnect the sub power storage device other than said selected sub power storage device from said second voltage converter, and operative in a second mode for controlling said connection unit to disconnect each of said plurality of sub power storage devices from said second voltage converter, said control device including: