Power supply system and method for charging battery of vehicle

• US 9,321,359 B2
• Filed: 12/04/2013
• Issued: 04/26/2016
• Est. Priority Date: 03/07/2013
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Kong, Hun, Lee, Dongjun, Choe, Gyu Yeong, Kang, Gun Soo
• Primary Examiner(s): Williams, Arun
• Application Number:
  US14/096,403
• Publication Number:
  US 20140253018A1
• Time in Patent Office: 874 Days
• Field of Search: 320/104
• US Class Current: 1/1
• CPC Class Codes: B60L 53/22 Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/66 Data transfer between charging stations and vehicles
• CPC Class Codes: H02J 2207/40 adapted for charging from various sources, e.g. AC, DC or multivoltage
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 7/342 The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging with circuits for polarity protection H02J7/0034
• 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

A power supply system and method for charging a battery of a vehicle are provided and include a charger that is configured to charge the battery and a charging controller that is configured to receive a voltage to charge the battery and operate the charger. An auxiliary battery is configured to supply a first DC voltage to operate the charging controller and a power supplier is configured to generate a second DC voltage greater than the first DC voltage using external AC power, and to supply the second DC voltage to the charging controller as a driving power source to charge the battery. First and second diodes are respectively installed at output ends of the power supplier and the auxiliary battery, a cathode voltage of the second diode is increased when the power supplier supplies the second DC voltage, and the first DC voltage of the auxiliary battery is blocked.

Claims

1. A power supply system for charging a battery of a vehicle, comprising:

a charger configured to charge the battery;

a charging controller configured to receive a voltage to charge the battery and to operate the charger;

an auxiliary battery configured to supply a first direct current (DC) voltage to operate the charging controller; and

a power supplier configured to generate a second DC voltage greater than the first DC voltage using external AC power, and to supply the second DC voltage to the charging controller as a driving power source to charge the battery,

wherein first and second diodes are respectively installed at output ends of the power supplier and the auxiliary battery, a cathode voltage of the second diode is increased when the power supplier supplies the second DC voltage, and the first DC voltage of the auxiliary battery is blocked due to diode characteristics.

2. The system of claim 1, wherein the cathode voltage of the second diode is between the first DC voltage and the second DC voltage when the power supplier supplies the second DC voltage.

3. The system of claim 1, wherein the external AC power is input from electric vehicle service equipment (EVSE) in a home or a charging station.

4. The system of claim 3, wherein the charger boosts the DC voltage to a greater voltage by which the battery is charged based on operations of a plurality of switching elements.

5. The system of claim 1, wherein the second diode is switched on when the supply of the second DC voltage from the power supplier is stopped, and supplies the first DC voltage to the charging controller.

6. The system of claim 1, further comprising:

a communicator configured to receive a control pilot signal from the electric vehicle service equipment (EVSE) to establish a charging function.

7. A power supply method for charging a battery of a vehicle, the method comprising:

turning on, by a controller, a power latch when a control pilot signal is generated based on the connection of electric vehicle service equipment;

receiving, by the controller, a first direct current (DC) voltage from an auxiliary battery;

receiving, by the controller, a second DC voltage as a driving power source greater than the first DC voltage generated using external AC power; and

wherein the first DC voltage is blocked and controller receives the second DC voltage as a cathode voltage of a diode installed at the output end of the auxiliary battery is increased when the second DC voltage is applied.

8. The method of claim 7, further comprising:

boosting, by the controller, supplied DC voltage to a high voltage and charging the battery.

9. The method of claim 7, further comprising:

stopping, by the controller, the generation of the second DC voltage when the supply of external AC power is stopped; and

switching on, by the controller, the diode installed at the output end of the auxiliary battery and resuming the supply of the first DC voltage.

10. The method of claim 7, wherein the electric vehicle service equipment is charging equipment provided in a home or a charging stand provided in an electric vehicle charging station.

11. A non-transitory computer readable medium containing program instructions executed by a controller, the computer readable medium comprising:

program instructions that turn on a power latch when a control pilot signal is generated based on the connection of electric vehicle service equipment;

program instructions that receive a first direct current (DC) voltage from an auxiliary battery;

program instructions that receive a second DC voltage as a driving power source greater than the first DC voltage generated using external AC power; and

wherein the first DC voltage is blocked and controller receives the second DC voltage as a cathode voltage of a diode installed at the output end of the auxiliary battery is increased when the second DC voltage is applied.

12. The non-transitory computer readable medium of claim 11, further comprising:

program instructions that boost supplied DC voltage to a high voltage and charging the battery.

13. The non-transitory computer readable medium of claim 11, further comprising:

program instructions that stop the generation of the second DC voltage when the supply of external AC power is stopped; and

program instructions that switch on the diode installed at the output end of the auxiliary battery and resuming the supply of the first DC voltage.

14. The non-transitory computer readable medium of claim 11, wherein the electric vehicle service equipment is charging equipment provided in a home or a charging stand provided in an electric vehicle charging station.