US 2013/0257375 A1 · POWER SUPPLY APPARATUS FOR ELECTRICALLY POWERED VEHICLE AND METHOD FOR CONTROLLING THE SAME

Abstract

An electrically powered vehicle has a main battery and an auxiliary battery mounted therein. In external charging, a charging device performs AC/DC power conversion converting power received from an external power supply into power charged to main battery. A sub charging relay is connected between a predetermined node on an electric conduction path of the charging device in the AC/DC power conversion and the auxiliary battery. The sub charging relay is turned off in the external charging. The charging device is configured such that when the external charging is not performed and the sub charging relay is turned on the charging device performs DC/DC power conversion to convert power of the main battery via at least a portion of the electric conduction path in the AC/DC power conversion into power to be charged to the auxiliary battery and outputs the converted power on the predetermined node.

Claims15

Dependent claims

A power supply apparatus for an electrically powered vehicle, comprising:

a main power storage device
a sub power storage device outputting a voltage lower than that of said main power storage device;
a charging device operative in external charging for performing first power conversion to receive power from an external power supply and convert the received power into power charged to said main power storage device;
and
a first switch connected between a predetermined node on an electric conduction path of said charging device in said first power conversion and said sub power storage device, and opened in said external charging,
said charging device being configured such that when said external charging is not performed and said first switch is closed said charging device performs second power conversion to receive power from said main power storage device and convert the received power via at least a portion of said electric conduction path into power to be charged to said sub power storage device and said charging device outputs the converted power on said predetermined node.

3 more elements

A method for controlling a power supply apparatus for an electrically powered vehicle including a main power storage device and a sub power storage device outputting a voltage lower than that of said main power storage device, the method comprising the steps of:

in external charging performed to charge said main power storage device by an external power supply, causing a charging device to perform first power conversion to receive power from said external power supply and convert the received power into power charged to said main power storage device;
in said external charging, opening a first switch connected between a predetermined node on an electric conduction path of said charging device in said first power conversion and said sub power storage device;
closing said first switch when said first power conversion is not performed;
and
when said first switch is closed, causing said charging device to perform second power conversion to receive power from said main power storage device, convert the received power via at least a portion of said electric conduction path into power to be charged to said sub power storage device, and output the converted power on said predetermined node.

2 more elements

Dependencies are inferred from the claim text.

Power supply apparatus for electrically powered vehicle and method for controlling the same

Life of this patent

Power supply apparatus for electrically powered vehicle and method for controlling the same

Life of this patent

Abstract

Claims15