Degradation determining apparatus for power storage device and degradation determining method for power storage device

• US 8,423,233 B2
• Filed: 07/08/2009
• Issued: 04/16/2013
• Est. Priority Date: 07/11/2008
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Uchida, Masatoshi
• Primary Examiner(s): Tran, Khoi
• Assistant Examiner(s): Amin, Bhavesh V
• Application Number:
  US12/499,150
• Publication Number:
  US 20100010704A1
• Time in Patent Office: 1,378 Days
• Field of Search: 324426-434, 705/1.1, 701 291- 321, 701 342- 344
• US Class Current: 701/29.9
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 3/0053 relating to fuel cells
• CPC Class Codes: B60L 3/12 Recording operating variables ; Monitoring of operating variables
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: B60L 58/00 Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
• 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: 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: Y02T 90/40 Application of hydrogen technology to transportation, e.g. using fuel cells
• CPC Class Codes: Y04S 30/14 Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

A vehicle identifying unit obtains an identification number of a vehicle from the vehicle. A first evaluation unit evaluates a degradation state of a power storage device based on the use history of the power storage device obtained from the vehicle, using data analyzed beforehand concerning the relation between the use history and the degradation state of the power storage device. A second evaluation unit evaluates a degradation state of the power storage device using data collected when the power storage device of the vehicle is charged from a power station or when power is fed from the vehicle to the power station. A degradation determining unit determines the degradation state of the power storage device based on the degradation states evaluated by the first and second evaluation units.

Claims

1. A degradation determining apparatus for a power storage device mounted on a vehicle for driving, said vehicle being configured such that electric power can be transferred between said power storage device and a power supply external to the vehicle or an electrical load external to the vehicle, said degradation determining apparatus comprising:

a vehicle identifying unit for identifying said vehicle based on an identification number of said vehicle obtained from said vehicle;

a first evaluation processor for evaluating a degradation state of said power storage device mounted on the vehicle corresponding to the identification number obtained by said vehicle identifying unit based on use history of said power storage device indicated based on a travel distance or running time by said power storage device, using data analyzed beforehand concerning a relation between the use history and the degradation state of said power storage device;

a second evaluation processor for evaluating a degradation state of said power storage device, using data indicating a charge/discharge state of said power storage device measured when electric power is transferred between said power storage device mounted on said vehicle and said power supply or said electrical load; and

a degradation determining unit for determining a degradation state of said power storage device based on the degradation state evaluated by said first evaluation unit and the degradation state evaluated by said second evaluation unit.

2. The degradation determining apparatus for a power storage device according to claim 1, wherein

the degradation determining apparatus is provided for a power cable connecting said vehicle with said power supply or said electrical load, and

said vehicle identifying unit obtains said identification number from said vehicle when said power cable is connected to said vehicle.

3. The degradation determining apparatus for a power storage device according to claim 1, wherein when said identification number is obtained by said vehicle identifying unit, said data analyzed beforehand for the power storage device mounted on the vehicle corresponding to said identification number is obtained from a server via a data communication network.

4. The degradation determining apparatus for a power storage device according to claim 2, wherein when said identification number is obtained by said vehicle identifying unit, said data analyzed beforehand for the power storage device mounted on the vehicle corresponding to said identification number is obtained from a server via a data communication network.

5. A degradation determining method for a power storage device mounted on a vehicle for driving, said vehicle being configured such that electric power can be transferred between said power storage device and a power supply external to the vehicle or an electrical load external to the vehicle, said method comprising:

a step of identifying said vehicle based on an identification number of said vehicle obtained from said vehicle;

a first evaluation step of evaluating a degradation state of said power storage device mounted on the vehicle corresponding to the obtained identification number based on use history of said power storage device indicated based on a travel distance or running time by said power storage device, using data analyzed beforehand concerning a relation between the use history and the degradation state of said power storage device;

a second evaluation step of evaluating a degradation state of said power storage device, using data indicating a charge/discharge state of said power storage device measured when electric power is transferred between said power storage device mounted on said vehicle and said power supply or said electrical load; and

a step of determining a degradation state of said power storage device based on the degradation state evaluated in said first evaluation step and the degradation state evaluated in said second evaluation step.

6. The degradation determining method for a power storage device according to claim 5, wherein when a power cable connecting said vehicle with said power supply or said electrical load is connected to said vehicle, in said step of identifying said vehicle, said identification number is obtained from said vehicle.

7. The degradation determining method for a power storage device according to claim 5, further comprising a step of obtaining from a server via a data communication network said data analyzed beforehand for the power storage device mounted on the vehicle corresponding to the identification number obtained in said step of identifying said vehicle.

8. The degradation determining method for a power storage device according to claim 6, further comprising a step of obtaining from a server via a data communication network said data analyzed beforehand for the power storage device mounted on the vehicle corresponding to the identification number obtained in said step of identifying said vehicle.