CHARGING DEVICE FOR VEHICLE

• US 20120043807A1
• Filed: 05/14/2009
• Published: 02/23/2012
• Est. Priority Date: 05/14/2009
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ichikawa, Shinji
• Granted Patent: US 8,810,205 B2
• Time in Patent Office: Days
• US Class Current: 307/9.1
• CPC Class Codes: B60L 1/003 to auxiliary motors, e.g. for pumps, compressors
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2240/527 Voltage
• CPC Class Codes: B60L 2270/147 electro magnetic [EMI]
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 50/61 by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
• CPC Class Codes: B60L 53/00 Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60L 53/122 Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• 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 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/22 Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• 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

An electric power reception terminal is configured such that it can electrically be connected to an AC power supply. A charger is configured to convert AC power input from the electric power reception terminal to a prescribed DC voltage. A non-contact electric power reception portion is configured to receive electric power in a non-contact manner from an AC power supply as a result of magnetic coupling to an electric power transmission portion of the AC power supply. The non-contact electric power reception portion is connected to an electric power conversion circuit of the charger. A charge ECU compares conductive-reception electric power with non-contact-reception electric power, and controls the charger to perform charging by using any greater one of the conductive-reception electric power and the non-contact-reception electric power, based on a result of comparison.

Claims

1. A charging device for a vehicle for charging a power storage device mounted on a vehicle from an AC power supply outside the vehicle, comprising:

an electric power reception terminal configured such that it can electrically be connected to said AC power supply;

a charger configured to convert AC Power input from said electric power reception terminal to a prescribed DC voltage;

a non-contact electric power reception portion configured to receive electric power in a non-contact manner from said AC power supply as a result of magnetic coupling to an electric power transmission portion of said AC power supply; and

a control device for controlling said charger to perform charging by using any greater one of first received electric power indicating electric power input from said electric power reception terminal and second received electric power indicating electric power received by said non-contact electric power reception portion.

2. The charging device for a vehicle according to claim 1, wherein

said control device controls said charger to perform charging by using said first received electric power when lowering in electric power reception efficiency is sensed.

3. The charging device for a vehicle according to claim 1, wherein

said charger includes

a first rectifier unit configured to be able to rectify the AC power input from said electric power reception terminal,

an inverter connected to said first rectifier unit,

an isolation transformer connected to said inverter, and

a second rectifier unit configured to rectify an output from said isolation transformer, and

said non-contact electric power reception portion is connected to any of said first and second rectifier units.

4. The charging device for a vehicle according to claim 1, wherein

said charger includes

a first rectifier unit configured to be able to rectify the AC power input from said electric power reception terminal,

an inverter connected to said first rectifier unit,

an isolation transformer connected to said inverter, and

a second rectifier unit configured to rectify an output from said isolation transformer,

said non-contact electric power reception portion includes

an electric power reception coil configured to magnetically be coupled to an electric power transmission coil provided in said electric power transmission portion, and

a third rectifier unit configured to rectify an output from said electric power reception coil, and

said third rectifier unit is connected between said first rectifier unit and said inverter.

8. The charging device for a vehicle according to claim 2, wherein

said charger includes

a first rectifier unit configured to be able to rectify the AC power input from said electric power reception terminal,

an inverter connected to said first rectifier unit,

an isolation transformer connected to said inverter, and

a second rectifier unit configured to rectify an output from said isolation transformer, and

said non-contact electric power reception portion is connected to any of said first and second rectifier units.

9. The charging device for a vehicle according to claim 2, wherein

said charger includes

a first rectifier unit configured to be able to rectify the AC power input from said electric power reception terminal,

an inverter connected to said first rectifier unit,

an isolation transformer connected to said inverter, and

a second rectifier unit configured to rectify an output from said isolation transformer,

said non-contact electric power reception portion includes

an electric power reception coil configured to magnetically be coupled to an electric power transmission coil provided in said electric power transmission portion, and

a third rectifier unit configured to rectify an output from said electric power reception coil, and

said third rectifier unit is connected between said first rectifier unit and said inverter.

5. A charging device for a vehicle for charging a power storage device mounted on a vehicle from an AC power supply outside the vehicle, comprising:

an electric power reception terminal configured such that it can electrically be connected to said AC power supply;

a charger configured to convert AC power input from said electric power reception terminal to a prescribed DC voltage;

a non-contact electric power reception portion configured to receive electric power in a non-contact manner from said AC power supply as a result of magnetic coupling to an electric power transmission portion of said AC power supply; and

a control device for controlling said charger,

said charger including

a first rectifier unit configured to be able to rectify the AC power input from said electric power reception terminal,

an inverter connected to said first rectifier unit,

an isolation transformer connected to said inverter, and

a second rectifier unit configured to rectify an output from said isolation transformer,

said non-contact electric power reception portion including

an electric power reception coil configured to magnetically be coupled to an electric power transmission coil provided in said electric power transmission portion, and

a third rectifier unit configured to rectify an output from said electric power reception coil,

said third rectifier unit being connected between said first rectifier unit and said inverter, and

said control device adjusting a DC voltage between said first rectifier unit and said inverter between which said third rectifier unit is connected based on magnitude of electric power received by said non-contact electric power reception portion, when charging is performed by using electric power received by said non-contact electric power reception portion.

6. The charging device for a vehicle according to claim 5, wherein

said control device adjusts the DC voltage between said first rectifier unit and said inverter between which said third rectifier unit is connected based on magnitude of electric power received by said non-contact electric power reception portion, when charging is performed simultaneously by using both of electric power received by said non-contact electric power reception portion and electric power input from said electric power reception terminal.

7. The charging device for a vehicle according to claim 5, wherein

said control device adjusts said DC voltage to a square root value of a value obtained by multiplying a value of electric power received by said non-contact electric power reception portion by target impedance.

10. The charging device for a vehicle according to claim 6, wherein

said control device adjusts said DC voltage to a square root value of a value obtained by multiplying a value of electric power received by said non-contact electric power reception portion by target impedance.