Power supply system, vehicle with the same, control method of power supply system and computer-readable recording medium bearing program causing computer to execute control method of power supply system

• US 20100001583A1
• Filed: 10/02/2007
• Published: 01/07/2010
• Est. Priority Date: 10/24/2006
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ichikawa, Shinji
• Granted Patent: US 7,989,978 B2
• Time in Patent Office: Days
• US Class Current: 307/10.1
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• 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 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 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 50/60 using power supplied by batteries in combination with fuel cells B60L50/75
• CPC Class Codes: B60L 50/61 by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: B60L 58/20 having different nominal voltages
• CPC Class Codes: B60L 58/26 by cooling
• CPC Class Codes: B60L 58/27 by heating
• CPC Class Codes: B60L 58/30 for monitoring or controlling fuel cells
• CPC Class Codes: B60L 58/34 by heating
• CPC Class Codes: H01M 10/443 in response to temperature
• CPC Class Codes: H01M 10/615 Heating or keeping warm
• CPC Class Codes: H01M 10/625 Vehicles
• CPC Class Codes: H01M 10/637 characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching means for preventing undesired use or discharge H01M50/572
• CPC Class Codes: H02P 29/60 : Controlling or determining the temperature of the motor or of the drive H02P29/02 takes precedence
• CPC Class Codes: Y02E 60/10 : Energy storage using batteries
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y02T 10/64 : Electric machine technologies in electromobility
• 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 10/72 : Electric energy management in electromobility
• CPC Class Codes: Y02T 90/40 : Application of hydrogen technology to transportation, e.g. using fuel cells

Abstract

A temperature increase power command producing unit produces a temperature increase power command value for transferring a power between power storage devices when heating control for raising temperature of the power storage device is performed. The temperature increase power command producing unit provides the temperature increase power command value to a current control unit, and provides a command value prepared by inverting a sign of the temperature increase power command value to a current control unit. The current control unit performs current control based on a first current command value and the temperature increase power command value, and the current control unit performs current control based on the second current command value and the command value prepared by inverting the sign of the temperature increase power command value.

Claims

1. A power supply system capable of transferring a power to and from a load device, comprising

a plurality of chargeable power storage devices;

a power line for transferring a power between the power supply system and said load device;

a plurality of converters provided corresponding to said plurality of power storage devices, respectively, and each performing voltage conversion between the corresponding power storage device and said power line; and

a control device controlling said plurality of converters, wherein

said control device includes;

a first command producing unit producing a first power command for transferring a power between the power supply system and said load device,

a second command producing unit producing a second power command for transferring a power between said plurality of power storage devices when temperature increase control is performed for increasing a temperature of at least one of the plurality of power storage devices, and

a control unit controlling said plurality of converters such that the power indicated by said first power command is transferred between the power supply system and said load device, and the power indicated by said second power command is transferred between said plurality of power storage devices.

2. The power supply system according to claim 1, wherein

said second command producing unit produces said second power command when a temperature of at least one of said plurality of power storage devices is lower than a specified value.

3. The power supply system according to claim 1, wherein

said second command producing unit produces said second power command such that a sum of power command values produced as said second power command for each of said plurality of converters becomes equal to zero.

4. The power supply system according to claim 1, wherein

said first command producing unit produces said first power command such that a voltage on said power line attains a predetermined value.

5. The power supply system according to claim 1, wherein

said control unit controls said plurality of converters based on a third power command prepared by adding said second power command to said first power command.

6. A vehicle comprising:

the power supply system according to claim 1; and

a drive power generating unit generating a drive power of the vehicle by receiving a power supplied from said power supply system.

13. A vehicle comprising:

the power supply system according to claim 2; and

a drive power generating unit generating a drive power of the vehicle by receiving a power supplied from said power supply system.

14. A vehicle comprising:

the power supply system according to claim 3; and

a drive power generating unit generating a drive power of the vehicle by receiving a power supplied from said power supply system.

15. A vehicle comprising:

the power supply system according to claim 4; and

a drive power generating unit generating a drive power of the vehicle by receiving a power supplied from said power supply system.

16. A vehicle comprising:

the power supply system according to claim 5; and

a drive power generating unit generating a drive power of the vehicle by receiving a power supplied from said power supply system.

7. A control method of a power supply system capable of transferring a power to and from a load device, said power supply system including

a plurality of chargeable power storage devices,

a power line for transferring a power between the power supply system and said load device, and

a plurality of converters provided corresponding to said plurality of power storage devices, respectively, and each performing voltage conversion between the corresponding power storage device and said power line,

said control method comprising:

a first step of producing a first power command for transferring a power between said power supply system and said load device,

a second step of producing a second power command for transferring a power between said plurality of power storage devices when temperature increase control is performed for increasing a temperature of at least one of said plurality of power storage devices, and

a third step of controlling said plurality of converters such that the power indicated by said first power command is transferred between said power supply system and said load device, and the power indicated by said second power command is transferred between said plurality of power storage devices.

8. The control method according to claim 7, wherein

in said second step, said second power command is produced when a temperature of at least one of said plurality of power storage devices is lower than a specified value.

9. The control method according to claim 7, wherein

in said second step, said second power command is produced such that a sum of power command values produced as said second power command for each of said plurality of converters becomes equal to zero.

10. The control method according to claim 7, wherein

in said first step, said first power command is produced such that a voltage on said power line attains a predetermined value.

11. The control method according to claim 7, wherein

in said third step, said plurality of converters are controlled based on a third power command prepared by adding said second power command to said first power command.

12. A computer-readable recording medium bearing a program for causing a computer to execute the control method according to claim 7.

17. A computer-readable recording medium bearing a program for causing a computer to execute the control method according to claim 8.

18. A computer-readable recording medium bearing a program for causing a computer to execute the control method according to claim 9.

19. A computer-readable recording medium bearing a program for causing a computer to execute the control method according to claim 10.

20. A computer-readable recording medium bearing a program for causing a computer to execute the control method according to claim 11.