Apparatus and method for preventing overshoot at the beginning of slow charging

• US 9,527,397 B2
• Filed: 11/26/2014
• Issued: 12/27/2016
• Est. Priority Date: 08/13/2014
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Baek, Jong-Kil
• Primary Examiner(s): WILLIAMS, ARUN C
• Application Number:
  US14/554,694
• Publication Number:
  US 20160046196A1
• Time in Patent Office: 762 Days
• Field of Search: 320/109
• US Class Current: 1/1
• CPC Class Codes: B60L 53/62 in response to charging parameters, e.g. current, voltage or electrical charge
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: B60L 58/15 Preventing overcharging
• CPC Class Codes: H02J 7/00304 Overcurrent protection
• 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

Abstract

An apparatus for preventing overshoot at the beginning of slow charging is provided. The apparatus includes a controller configured to receive initial charging command information during slow charging from electric vehicle supply equipment (EVSE) and generate initial charging information for preventing overshoot using the initial charging command information. The apparatus further includes a charger for performing charging of a battery using the initial charging information, and a battery management system (BMS) configured to generate sensing information by sensing the charger, and charge the battery using the sensing information based on an originally set algorithm of the EVSE after a preset time based on whether the charging of the battery is stabilized.

Claims

1. A system for preventing overshoot at the beginning of slow charging, comprising:

a memory configured to store program instructions; and

a controller configured to execute the program instructions, the program instructions when executed configured to;

receive initial charging command information during slow charging from electric vehicle supply equipment (EVSE);

generate initial charging information for preventing overshoot using the initial charging command information;

operate a charger configured to charge a battery using the initial charging information, wherein the initial charging information is set to be an amount less than an initial amount of charging of the initial charging command information; and

operate a battery management system (BMS) to generate sensing information, by the BMS sensing the charger, and charge the battery with the initial amount of charging of the initial charging command information based on an originally set algorithm of the EVSE after a preset time based on whether the charging of the battery is stabilized using the sensing information,

wherein the initial charging command information includes initial current command information.

2. The system of claim 1, wherein the initial charging command information is a control pilot (CP) duty (%).

3. The system of claim 1, wherein the program instructions when executed are further configured to:

determine whether an input signal based on the initial charging information of the charger coincides with an output signal based on the initial charging information to determine whether the charging of the battery is stabilized.

4. The system of claim 1, wherein the preset time is about 1 to 3 seconds.

5. The system of claim 1, wherein the charger is an on-board charger (OBC).

6. The system of claim 1, wherein communication between the EVSE and the controller is performed using a technology selected from the group of technologies consisting of:

a controller area network (CAN), a power line communication (PLC), ZigBee, and Bluetooth.

7. The system of claim 1, wherein program instructions when executed are further configured to:

output an estimated charging time of the battery calculated using the initial charging information.

8. A method for preventing overshoot at the beginning of slow charging, comprising:

receiving, by a controller, initial charging command information during slow charging from electric vehicle supply equipment (EVSE);

generating, by the controller, initial charging information for preventing overshoot using the initial charging command information;

operating, by the controller, a charger to charge a battery using the initial charging information, wherein the initial charging information is set to be an amount less than an initial amount of charging of the initial charging command information;

operating, by the controller, a sensor configured to sense the charger to generate sensing information;

determining, by the controller, whether the charging of the battery is stabilized using the sensing information; and

operating, by the controller, the charger to charge the battery with the initial amount of charging of the initial charging command information based on an originally set algorithm of the EVSE after a preset time in response to determining that the charging is stabilized,

wherein the initial charging command information includes initial current command information.

9. The method of claim 8, wherein the initial charging command information includes a control pilot (CP) duty (%).

10. The method of claim 8, wherein the stabilization of the charging is determined through whether an input signal based on the initial charging information of the charger coincides with an output signal based on the initial charging information.

11. The method of claim 8, wherein the preset time is about 1 to 3 seconds.

12. The method of claim 8, wherein the charging of the battery is performed using an on-board charger (OBC).

13. The method of claim 8, wherein communication between the EVSE and a controller is performed using a technology selected from the group of technologies consisting of:

a controller area network (CAN), a power line communication (PLC), ZigBee, and Bluetooth.

14. The method of claim 8, further comprising outputting, by the controller, an estimated charging time of the battery calculated using the initial charging information.

15. A non-transitory computer readable medium containing program instructions executed by a processor for preventing overshoot at the beginning of slow charging, the computer readable medium comprising:

program instructions that receive initial charging command information during slow charging from electric vehicle supply equipment (EVSE);

program instructions that generate initial charging information for preventing overshoot using the initial charging command information;

program instructions that operate a charger configured to charge a battery using the initial charging information, wherein the initial charging information is set to be an amount less than an initial amount of charging of the initial charging command information; and

program instructions that operate a battery management system (BMS) to generate sensing information, by the BMS sensing the charger, and charge the battery with an initial amount of charging of the initial charging command information based on an originally set algorithm of the EVSE after a preset time based on whether the charging of the battery is stabilized using the sensing information,

wherein the initial charging command information includes initial current command information.

16. The non-transitory computer readable medium of claim 15, further comprising:

program instructions that determine whether an input signal based on the initial charging information of the charger coincides with an output signal based on the initial charging information to determine whether the charging of the battery is stabilized.