Method and apparatus for controlling regenerative braking of vehicle

Patent metadata

Field	Value
Publication number	US-9616757-B2
Application number	US-201414542613-A
Country	US
Kind code	B2
Filing date	Nov 16, 2014
Priority date	May 20, 2014
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

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.

First claim

What is claimed is:

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 amo

Assignees

• Hyundai Motor Co Ltd

Inventors

• Lee Jun Yong
• Jung Min Young
• Kim Dae Kwang

Classifications

• Y02T90/16

  Information or communication technologies improving the operation of electric vehicles · CPC title

• B60L7/18

  Controlling the braking effect (B60L7/12, B60L7/14, B60L7/16 take precedence) · CPC title

• B60T8/172

  Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters {(B60T8/17551 takes precedence)} · CPC title

• B60W2720/106

  Longitudinal acceleration · CPC title

• B60W2552/15

  Road slope, i.e. the inclination of a road segment in the longitudinal direction · CPC title