Method and apparatus for controlling regenerative braking of vehicle

• US 9,616,757 B2
• Filed: 11/16/2014
• Issued: 04/11/2017
• Est. Priority Date: 05/20/2014
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Jung, Min Young, Kim, Dae Kwang, Lee, Jun Yong
• Primary Examiner(s): Melton, Todd
• Assistant Examiner(s): ROBERSON, JASON R
• Application Number:
  US14/542,613
• Publication Number:
  US 20150336458A1
• Time in Patent Office: 877 Days
• CPC Class Codes: B60K 2006/4825 Electric machine connected or connectable to gearbox input shaft
• CPC Class Codes: B60L 15/2009 for braking
• CPC Class Codes: B60L 15/2045 for optimising the use of energy
• CPC Class Codes: B60L 15/2054 by controlling transmissions or clutches
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2240/12 Speed
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2240/441 Speed
• CPC Class Codes: B60L 2240/443 Torque
• 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 2240/642 Slope of road
• CPC Class Codes: B60L 2240/80 Time limits
• CPC Class Codes: B60L 2250/26 by pedal actuation
• CPC Class Codes: B60L 2260/52 drive range estimation, e.g. of estimation of available travel distance
• CPC Class Codes: B60L 2260/54 Energy consumption estimation
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 58/15 Preventing overcharging
• CPC Class Codes: B60L 7/14 : for vehicles propelled by ac motors
• CPC Class Codes: B60L 7/18 : Controlling the braking effect B60L7/12, B60L7/14, B60L7/16 take precedence
• CPC Class Codes: B60L 7/26 : Controlling the braking effect
• CPC Class Codes: B60T 8/172 : Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters B60T8/17551 takes precedence
• CPC Class Codes: B60W 20/12 : using control strategies taking into account route information estimation or calculation of non-directly measurable driving parameters B60W40/00
• CPC Class Codes: B60W 2510/08 : Electric propulsion units
• CPC Class Codes: B60W 2510/244 : Charge state
• CPC Class Codes: B60W 2552/15 : Road slope, i.e. the inclination of a road segment in the longitudinal direction
• CPC Class Codes: B60W 2552/30 : Road curve radius
• CPC Class Codes: B60W 2554/00 : Input parameters relating to objects
• CPC Class Codes: B60W 2555/60 : Traffic rules, e.g. speed limits or right of way
• CPC Class Codes: B60W 2720/106 : Longitudinal acceleration
• CPC Class Codes: B60W 30/18127 : Regenerative braking
• 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 90/16 : Information or communication technologies improving the operation of electric vehicles

Abstract

A method and apparatus for controlling regenerative braking of a vehicle are provided. The method of controlling regenerative braking of a vehicle includes: receiving information regarding the scheduled driving route from a path information providing device, estimating a regenerable segment based on the information regarding the scheduled driving route and calculating a regenerable energy amount based on the regenerable segment, calculating a dischargeable energy amount based on the regenerable energy amount and setting a dischargeable segment and a discharge control amount based on the dischargeable energy amount, controlling discharge of a battery based on the discharge control amount at the dischargeable segment and measuring an actually discharged actual discharge energy amount; and controlling regenerative braking of a battery based on a regeneration control amount at the regenerable segment and measuring actually regenerated entire regeneration energy amount.

Claims

1. A method of controlling regenerative braking of a vehicle comprising:

receiving, by a controller, information regarding a scheduled driving route from a path information providing device;

estimating, by the controller, a regenerable segment based on the information regarding the scheduled driving route and calculating a regenerable energy amount based on the regenerable segment;

calculating, by the controller, a dischargeable energy amount based on the regenerable energy amount and determining a dischargeable segment and a discharge control amount based on the dischargeable energy amount;

adjust, by the controller, discharge of a battery based on the discharge control amount at the dischargeable segment and measuring an actually discharged energy amount; and

executing, by the controller, regenerative braking of the vehicle based on a regeneration control amount at the regenerable segment and measuring an actually regenerated entire regeneration energy amount,

wherein the executing of regenerative braking of the battery includes;

calculating, by the controller, target deceleration based on the scheduled driving route, vehicle information, and energy information,

calculating, by the controller, present deceleration of the vehicle using a speed and an acceleration value of the vehicle, and

reducing, by the controller, the regeneration control amount when the present deceleration is greater than the target deceleration and increasing the regeneration control amount when the present deceleration is equal to or less than the target deceleration,

wherein the vehicle information includes at least one selected from the group consisting of;

a brake hydraulic pressure, a speed of the vehicle, and a gear stage,

wherein the energy information includes at least one selected from the group consisting of;

a regenerable energy amount, an actual discharge energy amount, a time point regeneration energy amount, and a State Of Charge (SOC) of a battery, and

wherein the time point regeneration energy amount includes a first time point regeneration energy amount generated by measuring a regenerated energy amount at a random time point of the regenerable segment and a second time point regeneration energy amount regenerated from a regenerable segment start time to a random time point based on the first time point regeneration energy amount point.

2. The method of claim 1, wherein the regenerable segment is estimated using the information regarding the scheduled driving route and a correction coefficient, and the regenerable energy amount is calculated using the regenerable segment, the information regarding the scheduled driving route, and the correction coefficient.

3. The method of claim 2, wherein the correction coefficient is reset based on the regenerable energy amount and the entire regeneration energy amount.

4. The method of claim 1, wherein the information regarding the scheduled driving route includes at least one selected from the group consisting of:

slope information, curvature information, speed limit information, and real time traffic information.

5. An apparatus for controlling regenerative braking of a vehicle that connects to a path information providing device, the regenerative braking control apparatus comprising:

a vehicle controller configured to integrally operate a motor controller and a battery management system with a network,

wherein the motor controller is configured to adjust driving and torque of a motor and the battery management system is configured to adjust a charge and discharge state of a battery,

wherein the vehicle controller is configured to estimate a regenerable segment based on information regarding a scheduled driving route received from the path information providing device, determine a regeneration control amount at the regenerable segment, control the battery management system based on the regeneration control amount at the regenerable segment, and measure an actually regenerated entire regeneration energy amount at the regenerable segment,

wherein the vehicle controller is further configured to calculate target deceleration based on the scheduled driving route, vehicle information, and energy information, calculate present deceleration of the vehicle using a speed and an acceleration value of the vehicle, and reduce the regeneration control amount when the present deceleration is greater than the target deceleration and increase the regeneration control amount when the present deceleration is equal to or less than the target deceleration,

wherein the vehicle information includes at least one selected from the group consisting of;

a brake hydraulic pressure, a speed of the vehicle, and a gear stage,

wherein the energy information includes at least one selected from the group consisting of;

a regenerable energy amount, an actual discharge energy amount, a time point regeneration energy amount, and a State Of Charge (SOC) of a battery, and

wherein the time point regeneration energy amount includes a first time point regeneration energy amount generated by measuring a regenerated energy amount at a random time point of the regenerable segment and a second time point regeneration energy amount regenerated from a regenerable segment start time to a random time point based on the first time point regeneration energy amount point.

6. The apparatus of claim 5, wherein the vehicle controller is configured to calculate a dischargeable energy amount using a regenerable energy amount calculated based on the regenerable segment and determine a dischargeable segment and a discharge control amount based on the dischargeable energy amount.

7. The apparatus of claim 6, wherein the dischargeable energy amount is calculated by multiplexing the regenerable energy amount and a correction coefficient, and the correction coefficient is reset based on the regenerable energy amount and the entire regeneration energy amount.

8. The apparatus of claim 6, wherein the vehicle controller is configured to adjust discharge of the battery based on the discharge control amount at the dischargeable segment and measure an actually discharged energy amount at the dischargeable segment.

9. A non-transitory computer readable medium containing program instructions executed by a processor or controller for controlling regenerative braking of a vehicle, the computer readable medium comprising:

program instructions that estimate a regenerable segment based on the information regarding the scheduled driving route and calculating a regenerable energy amount based on the regenerable segment;

program instructions that calculate a dischargeable energy amount based on the regenerable energy amount and determining a dischargeable segment and a discharge control amount based on the dischargeable energy amount;

program instructions that adjust discharge of a battery based on the discharge control amount at the dischargeable segment and measuring an actually discharged energy amount; and

program instructions that execute regenerative braking of a battery based on a regeneration control amount at the regenerable segment and measuring an actually regenerated entire regeneration energy amount,

wherein the program instructions that execute regenerative braking of the battery include;

program instructions that calculate target deceleration based on the scheduled driving route, vehicle information, and energy information,

program instructions that calculate present deceleration of the vehicle using a speed and an acceleration value of the vehicle, and

program instructions that reduce the regeneration control amount when the present deceleration is greater than the target deceleration and increase the regeneration control amount when the present deceleration is equal to or less than the target deceleration,

wherein the vehicle information includes at least one selected from the group consisting of;

a brake hydraulic pressure, a speed of the vehicle, and a gear stage,

wherein the energy information includes at least one selected from the group consisting of;

a regenerable energy amount, an actual discharge energy amount, a time point regeneration energy amount, and a State Of Charge (SOC) of a battery, and

wherein the time point regeneration energy amount includes a first time point regeneration energy amount generated by measuring a regenerated energy amount at a random time point of the regenerable segment and a second time point regeneration energy amount regenerated from a regenerable segment start time to a random time point based on the first time point regeneration energy amount point.

10. The non-transitory computer readable medium of claim 9 wherein the regenerable segment is estimated using the information regarding the scheduled driving route and a correction coefficient, and the regenerable energy amount is calculated using the regenerable segment, the information regarding the scheduled driving route, and the correction coefficient, and

wherein the correction coefficient is reset based on the regenerable energy amount and the entire regeneration energy amount.

11. The non-transitory computer readable medium of claim 9 wherein the information regarding the scheduled driving route includes at least one selected from the group consisting of slope information, curvature information, speed limit information, and real time traffic information.