WIRELESS POWER TRANSFER METHOD FOR ELECTRIC VEHICLE BASED ON AUXILIARY BATTERY STATUS AND ELECTRIC VEHICLE FOR THE SAME

• US 20180001772A1
• Filed: 06/29/2017
• Published: 01/04/2018
• Est. Priority Date: 07/01/2016
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group), Kia Motors Corporation (Kia Corp.)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group), Kia Motors Corporation (Kia Corp.)
• Inventors: JANG, Jin Su, JUNG, Taek Hyun, SEONG, Jae Yong, KIM, Zeung Il
• Granted Patent: US 10,800,283 B2
• Time in Patent Office: Days
• CPC Class Codes: B60L 1/00 Supplying electric power to auxiliary equipment of vehicles circuit arrangements for charging batteries H02J7/00
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60L 53/126 Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• CPC Class Codes: B60L 53/20 characterised by converters located in the vehicle
• CPC Class Codes: B60L 53/22 Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: B60L 58/18 of two or more battery modules
• 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
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

A wireless power transfer (WPT) method based on a state of an auxiliary battery and an electric vehicle (EV) for the same includes receiving, by an EV charging apparatus, a wireless jump start request message from a user terminal; transmitting, by the EV charging apparatus, a primary jump start power according to the wireless jump start request message to the EV; driving an auxiliary power supply device provided in the EV by a secondary jump start power induced by the primary jump start power; driving a controller of the EV based on a preset power outputted from the auxiliary power supply device; and charging, by the controller of the EV, an auxiliary battery of the EV.

Claims

1. A wireless power transfer (WPT) method based on a state of an auxiliary battery, performed in a WPT system for an electric vehicle (EV), the method comprising:

receiving, by an EV charging apparatus, a wireless jump start request message from a user terminal;

transmitting, by the EV charging apparatus, a primary jump start power according to the wireless jump start request message to the EV;

driving an auxiliary power supply device provided in the EV by a secondary jump start power induced by the primary jump start power;

driving a controller of the EV based on a preset power outputted from the auxiliary power supply device; and

charging, by the controller of the EV, an auxiliary battery of the EV.

2. The wireless power transfer method according to claim 1, further comprising:

transmitting, by the controller of the EV, a wireless charging request message requesting to charge a high-voltage battery of the EV to the EV charging apparatus; and

transmitting, by the EV charging apparatus, a wireless charging power according to the wireless charging request message to the EV.

3. The wireless power transfer method according to claim 1, wherein the EV receives power from the EV charging apparatus through coupling between a ground assembly (GA) coil of the EV charging apparatus and a vehicle assembly (VA) coil of the EV, and the auxiliary power supply device is connected in parallel with the VA coil.

4. The wireless power transfer method according to claim 1, wherein the auxiliary power supply device is a switched mode power supply (SMPS) supplying a direct current (DC) power of 12 volts to the controller of the EV.

5. The wireless power transfer method according to claim 1, wherein, in the charging of the auxiliary battery of the EV, the controller of the EV turns off the auxiliary power supply device, and charges the auxiliary battery with a high-voltage battery supplying power to a power train system of the EV.

6. The wireless power transfer method according to claim 5, wherein, in the charging of the auxiliary battery of the EV, the controller of the EV converts power of the high-voltage battery to a low-voltage direct current (DC) power by using a low voltage DC-DC converter connected in parallel with the high-voltage battery, and charges the auxiliary battery by using the converted low-voltage DC power.

7. The wireless power transfer method according to claim 2, wherein the wireless charging request message includes information on a maximum direct current (DC) power and allowed voltage and current of the EV.

8. The wireless power transfer method according to claim 1, wherein the receiving a wireless jump start request message further comprises:

performing, by the EV charging apparatus, authentication of the user terminal; and

exchanging, by the EV charging apparatus, status information with the user terminal.

9. The wireless power transfer method according to claim 8, wherein the performing authentication comprises:

authenticating, by the EV charging apparatus, the EV through the user terminal.

10. The wireless power transfer method according to claim 1, wherein the EV transmits status information on the EV including whether or not the auxiliary battery is discharged through the user terminal and a telematics equipment.

11. An electric vehicle (EV) comprising:

a vehicle assembly (VA) coil for generating a secondary power by receiving a primary power from an EV charging apparatus;

a high-voltage battery that is charged by using the secondary power generated in the VA coil and supplies power to a power train system of the EV;

a communication module for controlling wireless charging of the EV by communicating with the EV charging apparatus;

a controller for controlling the communication module and charging the high-voltage battery by using the secondary power generated in the VA coil;

an auxiliary battery for supplying power to the controller; and

an auxiliary power supply device that is driven by a secondary jump start power and supplies power to the controller, when a primary jump start power is received from the EV charging apparatus and the secondary jump start power is generated from the primary jump start power at the VA coil.

12. The electric vehicle according to claim 11, wherein, when the controller is driven by the power supplied by the auxiliary power supply device, the controller controls charging of the auxiliary battery, and charges the high-voltage battery by using the secondary power generated in the VA coil by requesting the primary power to the EV charging apparatus after the charging of the auxiliary battery is completed.

13. The electric vehicle according to claim 11, wherein the auxiliary power supply device is connected in parallel with the VA coil.

14. The electric vehicle according to claim 11, wherein the auxiliary power supply device is a switched mode power supply (SMPS) supplying a direct current (DC) power of 12 volts to the controller of the EV.

15. The electric vehicle according to claim 11, wherein the controller of the EV turns off the auxiliary power supply device, and charges the auxiliary battery with the high-voltage battery supplying the power to the power train system of the EV.

16. The electric vehicle according to claim 15, wherein the controller of the EV converts power of the high-voltage battery to a low-voltage direct current (DC) power by using a low voltage DC-DC converter connected in parallel with the high-voltage battery, and charges the auxiliary battery by using the converted low-voltage DC power.

17. The electric vehicle according to claim 11, wherein the communication module transmits a wireless charging control message, including information on a maximum direct current (DC) power and allowed voltage and current of the EV, to the EV charging apparatus.

18. The electric vehicle according to claim 11, wherein the communication module transmits status information on the EV including whether or not the auxiliary battery is discharged through the user terminal and a telematics equipment.

19. A wireless charging method based on a state of an auxiliary battery for an electric vehicle (EV) having an auxiliary power supply device, the method comprising:

driving the auxiliary power supply device by a secondary jump start power generated by receiving a primary jump start power from an EV charging apparatus;

driving a controller of the EV by a preset power outputted from the auxiliary power supply device;

charging, by the controller of the EV, an auxiliary battery;

transmitting, by the controller of the EV, a wireless charging request message requesting to charge a high-voltage battery of the EV to the EV charging apparatus; and

transmitting, by the EV charging apparatus, a wireless charging power according to the wireless charging request message to the EV.

20. The wireless charging method according to claim 19, wherein the auxiliary power supply device is a switched mode power supply (SMPS) for supplying a direct current (DC) power of 12 volts to the controller of the EV.