Method for controlling battery of mild hybrid vehicle

Patent metadata

Field	Value
Publication number	US-9533675-B2
Application number	US-201514873174-A
Country	US
Kind code	B2
Filing date	Oct 1, 2015
Priority date	Oct 7, 2014
Publication date	Jan 3, 2017
Grant date	Jan 3, 2017

Abstract

A method for controlling the battery of a mild hybrid vehicle, according to an embodiment of the present invention, includes: a first step of detecting the traffic conditions based on the driving state of the vehicle; and a second step of adjusting the target SOC of an energy storage device based on the detected traffic conditions.

First claim

What is claimed is:

1. A method for controlling a battery of a mild hybrid vehicle comprising sensors and an electronic control unit (ECU), the method comprising:
detecting, by the sensors disposed in the vehicle, traffic conditions based on a driving state of the vehicle; and
adjusting, by the ECU of the vehicle, a target State of Charge (SOC) of an energy storage device, by increasing the target SOC or decreasing the target SOC, based on the detected traffic conditions,
wherein the detecting comprises:
setting, by the ECU, a first range of interest based on the number of times that the vehicle stops; and
detecting, by the sensors, the number of times that a Stop and Go function does not operate due to a low SOC of the energy storage device within the first range of interest.

2. The method of claim 1 , wherein the adjusting comprises:
comparing the number of times that the Stop and Go function does not operate with first and second reference values set in advance;
increasing the target SOC of the energy storage device, when the number of times that the Stop and Go function does not operate is larger than the first reference value; and
decreasing the target SOC of the energy storage device, when the number of times that the Stop and Go function does not operate is smaller than the second reference value, and
wherein the first reference value is larger than the second reference value.

3. A method for controlling a battery of a mild hybrid vehicle comprising sensors and an electronic control unit (ECU), the method comprising:
detecting, by the sensors disposed in the vehicle, a traffic condition based on a driving state of the vehicle; and
adjusting, by the ECU of the vehicle, a target State of Charge (SOC) of an energy storage device, by increasing the target SOC or decreasing the target SOC, based on the detected traffic condition,
wherein the detecting comprises:
setting, by the ECU, a second range of interest for detecting a trend of an SOC of the energy storage device; and
calculating, by the ECU, an average of the SOC of the energy storage device within the second range of interest.

4. The method of claim 3 , wherein the adjusting comprises:
comparing an absolute value of the difference between the calculated average of the SOC of the energy storage device and the target SOC of the energy storage device with a preset reference value.

5. The method of claim 4 , wherein the adjusting further comprises:
comparing the calculated average of the SOC of the energy storage device and the target SOC of the energy storage device, when the comparison result of the comparing the absolute value with the preset reference value shows that the absolute value of the difference between the calculated average of the SOC of the energy storage device and the target SOC of the energy storage device is larger than the preset reference value;
decreasing the target SOC of the energy storage device, when the calculated average of the SOC of the energy storage device is larger than the target SOC of the energy storage device, and
increasing the target SOC of the energy storage device, when the calculated average of the SOC of the energy storage device is smaller than the target SOC of the energy storage device.

6. The method of claim 3 , further comprising:
storing the adjusted target SOC of the energy storage device in a memory.

7. The method of claim 1 , further comprising:
generating, by a motor-generator of the vehicle, electrical energy;
converting, by an inverter of the vehicle, the generated electrical energy; and
supplying, by the inverter of the vehicle, toe converted electrical energy to the battery of the vehicle for charging the battery of the vehicle.

8. The method of claim 3 , further comprising:
generating, by a motor-generator of the vehicle, electrical energy;
converting, by an inverter of the vehicle, the generated electrical energy; and
supplying, by the inverter of the vehicle, toe converted electrical energy to the battery of the vehicle for charging the battery of the vehicle.

Assignees

• Mando Corp

Inventors

• Jang In Gyu

Classifications

• B60W20/13 Primary

  in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion · CPC title

• B60L11/1862

  Operations & Transport · mapped topic

• B60W20/12

  using control strategies taking into account route information {(estimation or calculation of non-directly measurable driving parameters B60W40/00)} · CPC title

• B60W2556/10

  Historical data · CPC title

• Y02T10/62

  Hybrid vehicles · CPC title