Battery charging control system and method for vehicle

• US 9,878,623 B2
• Filed: 11/18/2015
• Issued: 01/30/2018
• Est. Priority Date: 09/18/2015
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Choi, Kum Lim, Lee, Jae Wang
• Primary Examiner(s): Ngo, Brian
• Application Number:
  US14/945,124
• Publication Number:
  US 20170080810A1
• Time in Patent Office: 804 Days
• Field of Search: 320104, 320109, 320162, 320163
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 53/20 characterised by converters located in the vehicle
• CPC Class Codes: B60L 58/20 having different nominal voltages
• 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 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A battery charging control system for a vehicle includes: a high voltage battery supplying power to a driver of the vehicle; an auxiliary battery supplying power to an electric load of the vehicle; a first voltage converter connecting between the high voltage battery and the auxiliary battery; a second voltage converter connecting between the high voltage battery and the electric load; a switch having one side connected to a circuit line between the first voltage converter and the auxiliary battery and the other side connected to a circuit line between the second voltage converter and the electric load; and a controller controlling a turn on/off of the first voltage converter and the second voltage converter and a turn on/off of the switch depending on whether the first voltage converter and the second voltage converter is broken and the auxiliary battery needs to be charged.

Claims

1. A battery charging control system for a vehicle, comprising:

a high voltage battery configured to supply power to a driver of the vehicle;

an auxiliary battery configured to supply power to an electric load of the vehicle;

a first voltage converter connecting the high voltage battery to the auxiliary battery;

a second voltage converter connecting the high voltage battery to the electric load;

a switch at one end connected between the first voltage converter and the auxiliary battery and at other end connected between the second voltage converter and the electric load; and

a controller configured to control a turn on/off of the first voltage converter and the second voltage converter and a turn on/off of the switch depending on whether the first voltage converter and the second voltage converter are broken and on whether the auxiliary battery needs to be charged.

2. The battery charging control system of claim 1, wherein the controller turns on the switch when the first voltage converter or the second voltage converter is broken.

3. The battery charging control system of claim 1, wherein an output terminal voltage of the first voltage converter is higher than an output terminal voltage of the second voltage converter.

4. The battery charging control system of claim 3, wherein the controller turns on the first voltage converter and the second voltage converter and turns off the switch when the first voltage converter and the second voltage converter are not broken and the auxiliary battery needs to be charged.

5. The battery charging control system of claim 3, wherein the controller turns off the first voltage converter, turns on the second voltage converter, and turns on the switch when the first voltage converter and the second voltage converter are not broken and the auxiliary battery need not to be charged.

6. A battery charging control system for a vehicle, comprising:

a high voltage battery configured to supply power to a driver of the vehicle;

an auxiliary battery configured to supply power to an electric load of the vehicle;

a first voltage converter configured to connect the high voltage battery to the auxiliary battery;

a second voltage converter configured to connect the auxiliary battery to the electric load;

a switch at one end connected between the auxiliary battery and the second voltage converter and at other end connected between the second voltage converter and the electric load to be connected to the second voltage converter in parallel; and

a controller configured to control a turn on/off of the switch depending on whether the first voltage converter and the second voltage converter are broken and the auxiliary battery needs to be charged.

7. The battery charging control system of claim 6, wherein an output terminal voltage of the first voltage converter is equal to or more than an output terminal voltage of the second voltage converter and is changed within a preset output voltage range, and

the controller configured to control the turn on/off of the switch and the output terminal voltage of the first voltage converter depending on whether the first voltage converter and the second voltage converter are broken and the auxiliary battery needs to be charged.

8. The battery charging control system of claim 7, wherein the controller turns on the switch when the first voltage converter or the second voltage converter is broken.

9. The battery charging control system of claim 7, wherein the controller sets the output terminal voltage of the first voltage converter to be a maximum output voltage within the preset output voltage range and turns off the switch when the first voltage converter and the second voltage converter are not broken and the auxiliary battery needs to be charged.

10. The battery charging control system of claim 7, wherein the controller sets the output terminal voltage of the first voltage converter to be a minimum output voltage within the preset output voltage range and turns off the switch when the first voltage converter and the second voltage converter are not broken and the auxiliary battery need not to be charged.