Electrically-driven vehicle and method for controlling the same

Patent metadata

Field	Value
Publication number	US-9315105-B2
Application number	US-201214374717-A
Country	US
Kind code	B2
Filing date	Mar 7, 2012
Priority date	Mar 7, 2012
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

A bidirectional charger subjects power supplied from an external power supply to voltage conversion and charges a main power storage device and an auxiliary power storage device. Furthermore, the bidirectional charger is configured to be able to convert power in a bidirectional manner so as to be able to subject power stored in the main power storage device or power stored in the auxiliary power storage device to voltage conversion and to output power to electrical outlet. The electrical outlet is configured to be able to output power to an electrical appliance including a home appliance. When a travel driving force increases during use of the electrical outlet, a PM-ECU controls the bidirectional charger in such a way that power stored in the auxiliary power storage device is subjected to voltage conversion and output power to the electrical outlet.

First claim

The invention claimed is:

1. An electrically-driven vehicle, comprising:
a main power storage device;
an electric motor receiving a supply of power from said main power storage device and generating a travel driving force;
an auxiliary power storage device;
a power output unit configured to be able to output power to an electrical appliance including a home appliance;
a power conversion device electrically connected to said main power storage device, said auxiliary power storage device and said power output unit, and configured to be able to subject power stored in said main power storage device or power stored in said auxiliary power storage device to voltage conversion and output power to said power output unit; and
a control device controlling said power conversion device to subject power stored in said auxiliary power storage device to voltage conversion and output power to said power output unit when said travel driving force increases during use of said power output unit.

2. The electrically-driven vehicle according to claim 1 , wherein during use of said power output unit, when said travel driving force increases to cause a required output for said main power storage device to exceed outputtable power indicating power which can be outputted by said main power storage device, said control device controls said power conversion device to subject power stored in said auxiliary power storage device to voltage conversion and output power to said power output unit.

3. The electrically-driven vehicle according to claim 2 , wherein
said power conversion device includes a charger which subjects power supplied from a power supply provided outside of the vehicle to voltage conversion and charges said main power storage device and said auxiliary power storage device, and
said charger is configured to be able to subject power conversion in a bidirectional manner so as to be able to subject power stored in said main power storage device or power stored in said auxiliary power storage device to voltage conversion and output power to said power output unit.

4. The electrically-driven vehicle according to claim 3 , wherein said charger includes:
a main circuit configured to be able to subject voltage conversion in a bidirectional manner between said power supply and said main power storage device;
a sub power supply circuit configured to be able to subject voltage conversion in a bidirectional manner between said power supply and said auxiliary power storage device and having a smaller capacity than said main circuit.

5. The electrically-driven vehicle according to claim 2 , wherein when said travel driving force increases, said control device further controls a state of charge of said auxiliary power storage device so as to raise a state of charge of said auxiliary power storage device in advance.

6. The electrically-driven vehicle according to claim 5 , further comprising:
an information device having information related to a traveling path, wherein
when an increase in said travel driving force is estimated based on traveling path information from said information device, said control device controls a state of charge of said auxiliary power storage device so as to raise a state of charge of said auxiliary power storage device in advance.

7. The electrically-driven vehicle according to claim 5 , further comprising:
a voltage converter which subjects power outputted from said main power storage device to voltage conversion and outputs power to said auxiliary power storage device, wherein
said power conversion device includes a charger which subjects power supplied from a power supply provided outside of the vehicle to voltage conversion and charges said main power storage device and said auxiliary power storage device, and
said charger includes:
a main circuit configured to be able to subject voltage conversion in a bidirectional manner between said power supply and said main power storage device; and
a sub power supply circuit configured to be able to subject voltage conversion in a bidirectional manner between said power supply and said auxiliary power storage device and having a smaller capacity than said main circuit, and
said sub power supply circuit is electrically connected to said main circuit on a side of said main power storage device, and
in a case where said control device controls a state of charge of said auxiliary power storage device so as to raise a state of charge of said auxiliary power storage device in advance,
when power supplied to said auxiliary power storage device is within rating of said sub power supply circuit, said control device controls said sub power supply circuit such that power is supplied from said main power storage device to said auxiliary power storage device by said sub power supply circuit, and
when power supplied to said auxiliary power storage device exceeds rating of said sub power supply circuit, said control device controls said voltage converter such that power is supplied from said main power storage device to said auxiliary power storage device by said voltage converter.

8. The electrically-driven vehicle according to claim 1 , wherein said power conversion device includes a charger which subjects power supplied from a power supply provided outside of the vehicle to voltage conversion and charges said main power storage device and said auxiliary power storage device, and
said charger is configured to be able to subject power conversion in a bidirectional manner so as to be able to subject power stored in said main power storage device or power stored in said auxiliary power storage device to voltage conversion and output power to said power output unit.

9. The electrically-driven vehicle according to claim 8 , wherein said charger includes:
a main circuit configured to be able to subject voltage conversion in a bidirectional manner between said power supply and said main power storage device;
a sub power supply circuit configured to be able to subject voltage conversion in a bidirectional manner between said power supply and said auxiliary power storage device and having a smaller capacity than said main circuit.

10. The electrically-driven vehicle according to claim 1 , wherein when said travel driving force increases, said control device further controls a state of charge of said auxiliary power storage device so as to raise a state of charge of said auxiliary power storage device in advance.

11. The electrically-driven vehicle according to claim 10 , further comprising:
an information device having information related to a traveling path, wherein
when an increase in said travel driving force is estimated based on traveling path information from said information device, said control device controls a state of charge of said auxiliary power storage device so as to raise a state of charge of said auxiliary power storage device in advance.

12. The electrically-driven vehicle according to claim 10 , further comprising:
a voltage converter which subjects power outputted from said main power storage device to voltage conversion and outputs power to said auxiliary power storage device, wherein
said power conversion device includes a charger which subjects power supplied from a power supply provided outside of the vehicle to voltage conversion and charges said main power storage device and said auxiliary power storage device, and
said charger includes:
a main circuit configured to be able to subject voltage conversion in a bidirectional manner between said power supply and said main power storage device; and
a sub power supply circuit configured to be able to subject voltage conversion in a bidirectional m

Assignees

• Sakamoto Yosei
• Toyota Motor Co Ltd

Inventors

• Sakamoto Yosei

Classifications

• B60L2210/10

  DC to DC converters · CPC title

• B60L15/007

  Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles · CPC title

• B60L55/00

  Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements · CPC title

• B60L2210/30

  AC to DC converters · CPC title

• B60L2240/622

  by satellite navigation · CPC title