DEGRADATION ASSESSMENT SYSTEM FOR POWER STORAGE DEVICE, VEHICLE, DEGRADATION ASSESSMENT METHOD FOR POWER STORAGE DEVICE, AND COMPUTER-READABLE RECORDING MEDIUM HAVING PROGRAM RECORDED THEREON FOR COMPUTER TO EXECUTE THE DEGRADATION ASSESSMENT METHOD

• US 20090326749A1
• Filed: 08/15/2007
• Published: 12/31/2009
• Est. Priority Date: 08/30/2006
• Status: Abandoned Application

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Uchida, Masatoshi
• Application Number:
  US12/310,242
• Publication Number:
  US 20090326749A1
• Time in Patent Office: Days
• US Class Current: 701/22
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 50/61 by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/18 Cables specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/22 Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/24 Using the vehicle's propulsion converter for charging
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 53/665 Methods related to measuring, billing or payment
• CPC Class Codes: B60L 58/16 responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
• CPC Class Codes: G01R 31/007 using microprocessors or computers
• CPC Class Codes: G01R 31/392 Determining battery ageing or deterioration, e.g. state of health
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• 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: Y02T 90/167 : Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: Y04S 30/12 : Remote or cooperative charging
• CPC Class Codes: Y04S 30/14 : Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

A degradation assessment system includes a vehicle mounted with a power storage device, a charge station, a connection cable for connecting the vehicle to the charge station, and a server. The vehicle can charge the power storage device from the charge station. The charge station includes a degradation assessment device. The degradation assessment device collects data such as the voltage, charging current and temperature of the power storage device when the power storage device is charged from the charge station, and uses the collected data and assessment data obtained from the server to assess the degradation state of the power storage device.

Claims

1. A degradation assessment system for a power storage device mounted on a vehicle as a power supply for a traveling-purpose motor generating a drive power of the vehicle, said degradation assessment system comprising:

a vehicle configured to be able to charge said power storage device from a system power supply outside the vehicle; and

a degradation assessment device assessing a degradation state of said power storage device using data collected when said power storage device is charged from said system power supply.

2. The degradation assessment system according to claim 1, further comprising:

a charge mode selection unit capable of selecting one of a normal charge mode in which said power storage device is charged from said system power supply at a first charge rate, and a quick charge mode in which said power storage device is charged from said system power supply at a second charge rate higher than said first charge rate; and

a display unit capable of displaying a degradation state of said power storage device in a case where charging is performed in said normal charge mode, and a degradation state of said power storage device in a case where charging is performed in said quick charge mode.

3. The degradation assessment system according to claim 1, wherein

said vehicle includes:

an electric power conversion device configured to be able to convert electric power between said power storage device and said system power supply;

a connection device configured to be able to electrically connect said electric power conversion device to said system power supply; and

a control device controlling said electric power conversion device, and

said control device controls said electric power conversion device under a constant condition at least when said data is collected.

4. The degradation assessment system according to claim 3, wherein

when said data is collected, said control device controls said electric power conversion device such that a charging electric power from said system power supply to said power storage device is larger than a specified value.

5. The degradation assessment system according to claim 1, wherein

said degradation assessment device assesses the degradation state of said power storage device when an environment of said vehicle or an environment surrounding said vehicle satisfies a specified condition.

7. The degradation assessment system according to claim 2, wherein

said display unit displays a state of charge of said power storage device and displays a transition of the degradation state of said power storage device in conjunction with a transition of said state of charge, while said power storage device is charged from said system power supply.

6. (canceled)

8. A vehicle capable of being charged from a system power supply outside the vehicle, said vehicle comprising:

a power storage device provided as a power supply for a traveling-purpose motor generating a drive power for the vehicle;

an electric power conversion device configured to be able to convert electric power between said power storage device and said system power supply;

a connection device configured to be able to electrically connect said electric power conversion device to said system power supply; and

a degradation assessment device assessing a degradation state of said power storage device using data collected when said power storage device is charged from said system power supply.

9. The vehicle according to claim 8, further comprising:

a charge mode selection unit capable of selecting one of a normal charge mode in which said power storage device is charged from said system power supply at a first charge rate, and a quick charge mode in which said power storage device is charged from said system power supply at a second charge rate higher than said first charge rate; and

a display device capable of displaying a degradation state of said power storage device in a case where charging is performed in said normal charge mode, and a degradation state of said power storage device in a case where charging is performed in said quick charge mode.

10. The vehicle according to claim 8, further comprising a control device controlling said electric power conversion device, wherein

said control device controls said electric power conversion device under a constant condition at least when said data is collected.

11. The vehicle according to claim 10, wherein

when said data is collected, said control device controls said electric power conversion device such that a charging electric power from said system power supply to said power storage device is larger than a specified value.

12. The vehicle according to claim 8, wherein

said degradation assessment device assesses the degradation state of said power storage device when an environment of the vehicle or an environment surrounding the vehicle satisfies a specified condition.

14. The vehicle according to claim 9, wherein

said display device displays a state of charge of said power storage device and displays a transition of the degradation state of said power storage device in conjunction with a transition of said state of charge, while said power storage device is charged from said system power supply.

13. (canceled)

15. A degradation assessment method for a power storage device mounted on a vehicle as a power supply for a traveling-purpose motor generating a drive power of the vehicle,

said vehicle being configured to be able to charge said power storage device from a system power supply outside the vehicle,

said degradation assessment method comprising:

a first step of collecting data for assessing a degradation state of said power storage device when said power storage device is charged from said system power supply; and

a second step of assessing the degradation state of said power storage device using the collected data.

16. The degradation assessment method according to claim 15, further comprising:

a third step of selecting one of a normal charge mode in which said power storage device is charged from said system power supply at a first charge rate, and a quick charge mode in which said power storage device is charged from said system power supply at a second charge rate higher than said first charge rate; and

a fourth step of displaying at least one of a degradation state of said power storage device in a case where charging is performed in said normal charge mode, and a degradation state of said power storage device in a case where charging is performed in said quick charge mode.

17. The degradation assessment method according to claim 15, wherein

said vehicle includes:

an electric power conversion device configured to be able to convert electric power between said power storage device and said system power supply; and

a connection device configured to be able to electrically connect said electric power conversion device to said system power supply, and

said degradation assessment method further comprises a fifth step of controlling said electric power conversion device under a constant condition at least when said data is collected.

18. The degradation assessment method according to claim 17, wherein

when said data is collected, said electric power conversion device is controlled in said fifth step such that a charging electric power from said system power supply to said power storage device is larger than a specified value.

19. The degradation assessment method according to claim 15, further comprising a sixth step of determining whether or not an environment of said vehicle or an environment surrounding said vehicle satisfies a specified condition, wherein

when it is determined that said environment satisfies said specified condition, the degradation state of said power storage device is assessed in said second step.

21. The degradation assessment method according to claim 16, wherein

in said fourth step, a state of charge of said power storage device is displayed and a transition of the degradation state of said power storage device is displayed in conjunction with a transition of said state of charge, while said power storage device is charged from said system power supply.

22. A computer-readable recording medium having a program recorded for a computer to execute the degradation assessment method as recited in claim 15.

20. (canceled)