Method of Cooling Control for Drive Motor of Electric Vehicle

• US 20180111486A1
• Filed: 12/13/2016
• Published: 04/26/2018
• Est. Priority Date: 10/20/2016
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group), Kia Motors Corporation (Kia Corp.)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Kwon, Mun Soon
• Granted Patent: US 10,583,741 B2
• Time in Patent Office: Days
• CPC Class Codes: B60K 1/00 Arrangement or mounting of electrical propulsion units B60K7/00 takes precedence; arrangement or mounting of plural diverse prime-movers for mutual or common propulsion B60K6/00; electric transmission arrangements B60K17/12; electric equipment or propulsion of electrically-propelled vehicles per se B60L; current-collectors for power supply lines of electrically-propelled vehicles B60L5/00
• CPC Class Codes: B60K 11/00 Arrangement in connection with cooling of propulsion units heating the interior space B60H; cooling internal combustion engines per se F01P
• CPC Class Codes: B60K 2001/006 the electric motors
• CPC Class Codes: B60L 2240/12 Speed
• CPC Class Codes: B60L 2240/14 Acceleration
• CPC Class Codes: B60L 2240/425 Temperature
• CPC Class Codes: B60L 2240/64 Road conditions
• CPC Class Codes: B60L 2260/56 Temperature prediction, e.g. for pre-cooling
• CPC Class Codes: B60L 3/0061 relating to electrical machines
• CPC Class Codes: B60W 2556/50 of positioning data, e.g. GPS [Global Positioning System] data
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

Disclosed is a method of cooling control for a drive motor of an electric vehicle, the method including: a normal driving step of controlling the output of the cooling apparatus to be in proportion to a driving speed of the electric vehicle; a sensing step of predicting changes in the driving speed of the electric vehicle during the normal driving step; a first supercooling step of cooling residual heat of the drive motor prior to beginning of deceleration by temporarily operating the cooling apparatus at a higher output than the output controlled in the normal driving step, when deceleration is predicted in the sensing step; and a second supercooling step of cooling the drive motor in advance by temporarily operating the cooling apparatus at a higher output than the output controlled in the normal driving step, when acceleration is predicted in the sensing step after performing the first supercooling step.

Claims

1. A method of cooling control for a drive motor of an electric vehicle, the method comprising:

performing a normal driving step of controlling an output of a cooling apparatus for cooling the drive motor of the electric vehicle, the output controlled to be in proportion to a driving speed of the electric vehicle;

performing a sensing step of predicting changes in the driving speed of the electric vehicle during the normal driving step;

performing a first supercooling step of cooling residual heat of the drive motor prior to beginning of deceleration by temporarily operating the cooling apparatus at a higher output than the output controlled in the normal driving step, when deceleration is predicted in the sensing step; and

performing a second supercooling step of cooling the drive motor in advance by temporarily operating the cooling apparatus at a higher output than the output controlled in the normal driving step when acceleration is predicted in the sensing step after performing the first supercooling step.

2. The method of claim 1, wherein the first supercooling step is performed when the driving speed of the electric vehicle is predicted to be decreased to lower than 10 Km/h.

3. The method of claim 2, wherein the second supercooling step is performed when the driving speed of the electric vehicle is predicted to be increased to higher than 30 Km/h after performing the first supercooling step.

4. The method of claim 1, wherein the second supercooling step is performed when the driving speed of the electric vehicle is predicted to be increased to higher than 30 Km/h after performing the first supercooling step.

5. The method of claim 1, wherein the sensing step predicts that the electric vehicle is to be decelerated when a curved section exists in front of the electric vehicle running on a straight section of a road.

6. The method of claim 5, wherein the sensing step uses a navigation system to predict that the electric vehicle is to be decelerated when a curved section exists in front of the electric vehicle running on a straight section of a road.

7. The method of claim 5, wherein the sensing step predicts that the electric vehicle is to be accelerated when a straight section exists in front of the electric vehicle running on a curved section of a road.

8. The method of claim 7, wherein the sensing step uses a navigation system to predict whether a curved section or a straight section exists on a road in front of the electric vehicle running on the road.

9. The method of claim 1, wherein the sensing step predicts that the electric vehicle is to be accelerated when a straight section exists in front of the electric vehicle running on a curved section of a road.

10. The method of claim 9, wherein the sensing step uses a navigation system to predict that the electric vehicle is to be accelerated when a straight section exists in front of the electric vehicle running on a curved section of a road.

11. The method of claim 1, wherein the sensing step includes using a navigation system.

12. A method of cooling control for a drive motor of an electric vehicle, the method comprising:

controlling an output of a cooling apparatus for cooling the drive motor of the electric vehicle, the output controlled to be in proportion to a driving speed of the electric vehicle;

using a navigation system to predict a deceleration followed by an acceleration in the driving speed of the electric vehicle;

temporarily operating the cooling apparatus at a higher output to cool residual heat of the drive motor prior to beginning of the predicted deceleration; and

temporarily operating the cooling apparatus at a higher output to cool the drive motor when the acceleration is predicted.

13. The method of claim 12, wherein the deceleration is predicted when the driving speed of the electric vehicle is predicted to be decreased to lower than 10 Km/h.

14. The method of claim 13, wherein the acceleration is predicted when the driving speed of the electric vehicle is predicted to be increased to higher than 30 Km/h.

15. The method of claim 12, wherein the acceleration is predicted when the driving speed of the electric vehicle is predicted to be increased to higher than 30 Km/h.

16. The method of claim 12, wherein the navigation system predicts that the electric vehicle is to be decelerated when a curved section exists in front of the electric vehicle running on a straight section of a road.

17. The method of claim 12, wherein the navigation system predicts that the electric vehicle is to be accelerated when a straight section exists in front of the electric vehicle running on a curved section of a road.