Electrically powered vehicle and power supply system

• US 9,884,564 B2
• Filed: 09/25/2015
• Issued: 02/06/2018
• Est. Priority Date: 11/13/2014
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Yumita, Osamu, Ueo, Daisuke
• Primary Examiner(s): Barnie, Rexford
• Assistant Examiner(s): DHILLON, JAGDEEP S
• Application Number:
  US14/865,184
• Publication Number:
  US 20160137086A1
• Time in Patent Office: 865 Days
• Field of Search: 307 91, 307 101, 60299, 324509, 324503, 324512, 320109, 361109, 180 6529, 701 22, 363 2112, 363146
• CPC Class Codes: B60L 3/0069 relating to the isolation, e.g. ground fault or leak current
• CPC Class Codes: B60L 3/04 Cutting off the power supply under fault conditions protective devices and circuit arrangements in general H01H; H02H
• CPC Class Codes: B60L 55/00 Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
• CPC Class Codes: B60R 16/03 for supply of electrical power to vehicle subsystems or for circuit arrangements for charging batteries H02J7/00
• CPC Class Codes: G01R 31/14 Circuits therefor , e.g. for generating test voltages, sensing circuits G01R31/1209 - G01R31/1227 take precedence; for testing switches G01R31/327
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: Y04S 10/126 the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]

Abstract

A detector may be a device for detecting insulation decrease of an electric system included in a vehicle. An external terminal may be configured to be connectable with a terminal of a power supply cable connected to a power supply device. A power supply relay, which may be provided between the external terminal and a power line, may be controlled by a vehicle ECU to be in a closed state during external power supply from the electrically powered vehicle to the power supply device. When the insulation decrease of the electric system is detected by the detector, the vehicle ECU may control the power supply relay to come into an open state.

Claims

1. An electrically powered vehicle comprising:

an electric system included in the vehicle;

a detector configured to detect insulation decrease of the electric system; and

a control device that controls the electric system,

wherein the electric system includes

a driving system that generates driving power for traveling,

an external terminal for outputting DC power from the driving system to outside the vehicle, and

an opening/closing device provided in an electric path between the external terminal and the driving system,

wherein the external terminal is configured to be connectable with a converter separated from the vehicle,

the converter converts the DC power output from the external terminal into AC power and supplies the AC power to an external load, and

the control device is configured to;

(i) when the converter is not connected to the external terminal, control the opening/closing device to open the opening/closing device; and

(ii) when the insulation decrease of the electric system is detected by the detecting device before the converter is connected to the external terminal, control the opening/closing device to keep the opening/closing device in the open state even if the converter is connected to the external terminal.

2. The electrically powered vehicle according to claim 1, wherein when the insulation decrease of the electric system is detected by the detecting device before the converter is connected to the external terminal, the control device is configured to control the opening/closing device to keep the opening/closing device in an open state and permit the vehicle to travel using the driving system.

3. The electrically powered vehicle according to claim 1, wherein the control device is configured to:

when the insulation decrease of the electric system is not detected by the detecting device before the converter is connected to the external terminal, control the opening/closing device to close the opening/closing device when the converter is connected to the external terminal; and

while the control device controls the opening/closing device to close the opening/closing device, stop an operation of the detected device.

4. The electrically powered vehicle according to claim 3, wherein the control device controls the opening/closing device to open the opening/closing device when receiving a notification from an external device while the control device controls the opening/closing device to close the opening/closing device,

wherein the external device receives the DC power from the external terminal, and the notification indicates that insulation decrease has been detected in the external device.

5. The electrically powered vehicle according to claim 1, wherein

the driving system includes

a fuel cell, and

a power storage device that stores electric power generated by the fuel cell.

6. A power supply system comprising:

an electrically powered vehicle configured to output DC power to outside the vehicle; and

a power supply device that converts the DC power output from the electrically powered vehicle into AC power and supplies the AC power to an external load,

wherein the power supply device includes a first detecting device that detects insulation decrease of a power supply path to the external load when the power supply device is electrically connected to the electrically powered vehicle, and

the electrically powered vehicle includes

an electric system included in the vehicle,

a second detecting device that detects insulation decrease of the electric system, and

a control device that controls the electric system,

wherein the electric system includes

a driving system that generates driving power for traveling,

an external terminal, configured to be connectable with the power supply device, for outputting the DC power from the driving system to the power supply device, and

an opening/closing device provided in an electric path between the external terminal and the driving system, and

wherein the control device is configured to;

(i) when the power supply device is not connected to the external terminal, control the opening/closing device to open the opening/closing device; and

(ii) when the insulation decrease of the electric system is detected by the second detecting device before the power supply device is connected to the external terminal, control the opening/closing device to keep the opening/closing device in an open state even if the converter is connected to the external terminal.