Cooling device of power supply

• US 20050269994A1
• Filed: 04/19/2005
• Published: 12/08/2005
• Est. Priority Date: 06/02/2004
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ishishita, Teruo
• Granted Patent: US 7,102,310 B2
• Time in Patent Office: Days
• US Class Current: 320/150
• CPC Class Codes: B60L 2240/36 Temperature of vehicle components or parts
• 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 58/18 of two or more battery modules
• CPC Class Codes: B60L 58/20 having different nominal voltages
• CPC Class Codes: B60L 58/25 by controlling the electric load
• CPC Class Codes: B60L 58/26 by cooling
• CPC Class Codes: H01M 10/486 for measuring temperature
• CPC Class Codes: H01M 10/613 Cooling or keeping cold
• CPC Class Codes: H01M 10/625 Vehicles
• CPC Class Codes: H01M 10/63 Control systems charging or discharging in response to temperature H01M10/44 , H01M10/443; measurement of temperature H01M10/48 , H01M10/486
• CPC Class Codes: H01M 10/633 characterised by algorithms, flow charts, software details or the like
• CPC Class Codes: H01M 10/6563 with forced flow, e.g. by blowers
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 90/40 Application of hydrogen technology to transportation, e.g. using fuel cells

Abstract

An ECU executes a program including the steps of detecting a temperature TB of each battery block, calculating a desired output value VT of each motor based on a detected temperature, detecting output value V of each motor based on a signal transmitted from an F/V conversion circuit converting a pulse signal of a speed sensor provided on each motor into a voltage, reading a last DUTY command value D, calculating a difference DV between desired output value VT and output value V (DV=VT−V), calculating a DUTY command correction value for each motor based on difference DV, and adding a calculated DUTY command correction value to last DUTY command value D to calculate DUTY command value D.

Claims

1. A cooling device of a power supply formed with a plurality of electricity storage blocks, comprising:

a plurality of cooling fans respectively provided corresponding to said electricity storage blocks to supply a cooling medium to said electricity storage blocks;

a plurality of motors respectively driving said cooling fans;

temperature detection means for detecting a temperature of each of said electricity storage blocks;

calculation means for calculating a desired value of a driving voltage of each of said motors based on said temperature of each of the electricity storage blocks detected;

rotation number detection means for detecting a rotation number of each of said motors;

operation means for performing an operation of a calculated value of the driving voltage of each of said motors based on said rotation number detected; and

control means for controlling each of said motors based on a difference between said desired value and said calculated value.

2. The cooling device of a power supply according to claim 1, wherein

said control means includes means for controlling each of said motors to make the driving voltage of each of said motors higher when the difference between said desired value and said calculated value is larger.

3. The cooling device of a power supply according to claim 1, further comprising

means for suppressing the driving voltage of at least one of said motors provided corresponding to an electricity storage block having a temperature lower than at least one remaining electricity storage block of said plurality of electricity storage blocks.

4. The cooling device of a power supply according to claim 1, further comprising

means for increasing the driving voltage of at least one of said motors provided corresponding to an electricity storage block having a temperature higher than at least one remaining electricity storage block of said plurality of electricity storage blocks.

5. A cooling device of a power supply formed with a plurality of electricity storage blocks, comprising:

a plurality of cooling fans respectively provided corresponding to said electricity storage blocks to supply a cooling medium to said electricity storage blocks;

a plurality of motors respectively driving said cooling fans;

a temperature detection unit detecting a temperature of each of said electricity storage blocks;

a calculation unit calculating a desired value of a driving voltage of each of said motors based on said temperature of each of the electricity storage blocks detected;

a rotation number detection unit detecting a rotation number of each of said motors;

an operation unit performing an operation of a calculated value of the driving voltage of each of said motors based on said rotation number detected; and

a control unit controlling each of said motors based on a difference between said desired value and said calculated value.

6. The cooling device of a power supply according to claim 5, wherein

said control unit controls each of said motors to make the driving voltage of each of said motors higher when the difference between said desired value and said calculated value is larger.

7. The cooling device of a power supply according to claim 5, wherein

said cooling device suppresses the driving voltage of at least one of said motors provided corresponding to an electricity storage block having a temperature lower than at least one remaining electricity storage block of said plurality of electricity storage blocks.

8. The cooling device of a power supply according to claim 5, wherein

said cooling device increases the driving voltage of at least one of said motors provided corresponding to an electricity storage block having a temperature higher than at least one remaining electricity storage block of said plurality of electricity storage blocks.