Method and charging system for selecting charging mode of electric vehicle

• US 9,908,428 B2
• Filed: 11/17/2015
• Issued: 03/06/2018
• Est. Priority Date: 12/16/2014
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group), Kia Motors Corporation (Kia Corp.), YURA Corporation
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group), Kia Motors Corporation (Kia Corp.), YURA Corporation
• Inventors: Kim, Hyun Wook, Jeong, Myung Sun, Kim, Myoung Sik, Lee, Won Gon
• Primary Examiner(s): Lin, Sun
• Application Number:
  US14/943,810
• Publication Number:
  US 20160167538A1
• Time in Patent Office: 840 Days
• Field of Search: 320109
• CPC Class Codes: B60L 50/51 characterised by AC-motors
• CPC Class Codes: B60L 53/11 DC charging controlled by the charging station, e.g. mode 4
• CPC Class Codes: B60L 53/53 Batteries
• CPC Class Codes: B60L 53/665 Methods related to measuring, billing or payment
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 7/00036 Charger exchanging data with battery
• CPC Class Codes: H02J 7/00047 with provisions for charging different types of batteries
• CPC Class Codes: H02J 7/0047 with monitoring or indicating devices or circuits
• 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 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: Y02T 90/167 Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: Y04S 30/14 Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

A method and charging system for effectively performing measurement of a pulse width modulation (PWM) signal for selection of a charging mode between an electric vehicle and a charger are disclosed. The method for determining a charging mode of an electric vehicle includes measuring a duty ratio of a control signal applied to a communication line of a charger connector by a first controller for controlling slow charging and a second controller for controlling quick charging, transmitting measurement results obtained from each of the first controller and the second controller to a third controller in charge of a battery, determining a final duty ratio using the measurement results by the third controller, transmitting the determined final duty ratio to the first controller and the second controller, and starting charging in a mode corresponding to the final duty ratio.

Claims

1. A method for determining a charging mode of an electric vehicle, the method comprising:

measuring a duty ratio of a control signal applied to a communication line of a charger connector by a first controller for controlling slow charging and a second controller for controlling quick charging;

transmitting measurement results obtained from each of the first controller and the second controller to a third controller for managing a battery;

determining a final duty ratio using the measurement results by the third controller;

transmitting the determined final duty ratio to the first controller and the second controller; and

starting charging in a mode corresponding to the determined final duty ratio.

2. The method according to claim 1, wherein the control signal is a pulse width modulation (PWM) signal.

3. The method according to claim 1, wherein:

the first controller comprises an on-board charger (OBC) controller, and

the second controller comprises an electric vehicle communication controller (EVCC).

4. The method according to claim 1, wherein the third controller comprises a battery management system (BMS).

5. The method according to claim 1, wherein the first controller, the second controller, and the third controller are connected via controller area network (CAN) communication.

6. The method according to claim 1, wherein the third controller determines the final duty ratio to be a predetermined duty ratio when any one of the measurement results is equal to the predetermined duty ratio.

7. The method according to claim 1, wherein the starting comprises:

starting charging in a quick charging mode when the final duty ratio is equal to a predetermined duty ratio, and

starting the charging in a slow charging mode when the final duty ratio exceeds the predetermined duty ratio.

8. A charging system of an electric vehicle, the charging system comprising:

an inlet connected to a charging connector;

a first controller for controlling slow charging and first-measuring a duty ratio of a control signal of a communication line first-branched from the inlet;

a second controller for controlling quick charging and second-measuring a duty ratio of a communication line second-branched from the inlet; and

a third controller in charge of battery management, for acquiring a first measurement result of the first-measuring and a second measurement result of the second-measuring, determining a final measurement result using each of the first measurement result and the second measurement result, and transmitting the final measurement result to the first controller and the second controller,

wherein the first controller and the second controller perform controlling to start charging in a mode corresponding to a final duty ratio from a quick charging mode and a slow charging mode.

9. The charging system according to claim 8, wherein the control signal is a pulse width modulation (PWM) signal.

10. The charging system according to claim 8, wherein:

the first controller comprises an on-board charger (OBC) controller, and

the second controller comprises an electric vehicle communication controller (EVCC).

11. The charging system according to claim 8, wherein the third controller comprises a battery management system (BMS).

12. The charging system according to claim 8, wherein the first controller, the second controller, and the third controller are connected via controller area network (CAN) communication.

13. The charging system according to claim 8, wherein the third controller determines the final duty ratio to be a predetermined duty ratio when any one of measurement results is equal to the predetermined duty ratio.

14. The charging system according to claim 8, wherein:

the charging is started in a quick charging mode when the final duty ratio is a predetermined duty ratio, and

the charging is started in a slow charging mode when the final duty ratio exceeds the predetermined duty ratio.