RESONANCE TYPE NON-CONTACT POWER SUPPLY SYSTEM

• US 20130119930A1
• Filed: 07/28/2011
• Published: 05/16/2013
• Est. Priority Date: 07/29/2010
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Toyota Jidoshokki, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Kabushiki Kaisha Toyota Jidoshokki, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Sakoda, Shimpei, Ichikawa, Shinji, Takada, Kazuyoshi
• Application Number:
  US13/811,551
• Publication Number:
  US 20130119930A1
• Time in Patent Office: Days
• US Class Current: 320/108
• 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: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/007182 in response to battery voltage
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• 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

Abstract

A resonance type non-contact power supply system that supplies power through a primary resonance coil and a secondary resonance coil. The resonance type non-contact power supply system includes power supplying equipment and movable body equipment. The power supplying equipment includes a primary coil unit, which is provided with the primary resonance coil, and a distance detector, which detects the distance between the primary and secondary resonance coils. The movable body equipment includes a switch and a terminal resistor. When the distance detector detects the distance, the switch connects the terminal resistor to the secondary coil unit and disconnects a rectifier and power storage device from a secondary coil unit. When the movable body equipment receives power, the switch connects the rectifier and the power storage device to the secondary coil unit and disconnects the terminal resistor from the secondary coil unit.

Claims

1. A resonance type non-contact power supply system that supplies power through a primary-side resonance coil and a secondary-side resonance coil, the resonance type non-contact power supply system comprising:

power supplying equipment including an AC power supply, a primary coil unit, which includes the primary resonance coil, and a distance detector, wherein the primary resonance coil receives power from the AC power supply, and the distance detector detects the distance between the primary resonance coil and the secondary resonance coil; and

movable body equipment including a secondary coil unit, which includes the secondary resonance coil, a rectifier, a power storage device, a switch, and a terminal resistor, which is connectable by the switch to the secondary coil unit;

wherein the second resonance coil receives power from the primary resonance coil, the rectifier rectifies the power received by the secondary resonance coil, and the power storage device is supplied with power rectified by the rectifier;

wherein when the distance detector detects the distance, the switch connects the terminal resistor to the secondary coil unit and disconnects the rectifier, and the power storage device from the secondary coil unit; and

when the movable body equipment receives power, the switch connects the rectifier and the power storage device to the secondary coil unit and disconnects the terminal resistor from the secondary coil unit.

2. The resonance type non-contact power supply system according to claim 1, wherein the distance detector detects the distance between the primary resonance coil and the secondary resonance coil based on an input impedance of a resonance system when the AC power supply outputs AC power, and the resonance system includes the primary coil unit and the secondary coil unit.

3. The resonance type non-contact power supply system according to claim 1, wherein the distance detector includes a voltage sensor connected in parallel to the primary coil unit.

4. The resonance type non-contact power supply system according to claim 1, wherein the movable body equipment is installed in a vehicle.

5. The resonance type non-contact power supply system according to claim 4, wherein the vehicle includes a notification unit that notifies a driver that the distance detected by the distance detector is suitable for efficiently receiving power from the power supplying equipment.

6. The resonance type non-contact power supply system according to claim 1, wherein the movable body equipment further includes a charger provided between the rectifier and the power storage device, the power rectified by the rectifier is supplied to the charger, and the power storage device is connected to the charger.