Resonance type non-contact power supply system for vehicle and electric vehicle

• US 8,610,399 B2
• Filed: 07/27/2011
• Issued: 12/17/2013
• Est. Priority Date: 07/29/2010
• Status: Expired due to Fees

• 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: Takada, Kazuyoshi, Suzuki, Sadanori, Sakoda, Shimpei, Yamamoto, Yukihiro, Ichikawa, Shinji, Nakamura, Toru
• Primary Examiner(s): WILLIAMS, ARUN C
• Application Number:
  US13/191,649
• Publication Number:
  US 20120025761A1
• Time in Patent Office: 874 Days
• Field of Search: 320/108
• 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: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• 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 7/00712 the cycle being controlled or terminated in response to electric parameters
• 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 is provided that includes power supplying equipment and an electric vehicle. The power supply equipment includes an alternating-current power source and a primary-side resonance coil for receiving power from the alternating-current power source. The electric vehicle includes power receiving equipment and a vehicle height control device mounted on the electric vehicle. The power receiving equipment includes a secondary-side resonance coil that receives power from the primary-side resonance coil, a rectifier that rectifies the power received by the secondary-side resonance coil, and an electrical storage device, to which the power rectified by the rectifier is supplied. A resonance system that includes the primary-side resonance coil and the secondary-side resonance coil is configured such that impedance thereof is adjusted by the use of the vehicle height control device when the electrical storage device is charged.

Claims

1. A resonance type non-contact power supply system, the system comprising power supplying equipment and an electric vehicle, wherein

the power supplying equipment includes an alternating-current power source and a primary-side resonance coil for receiving power from the alternating-current power source,

the electric vehicle includes power receiving equipment and a vehicle height control device mounted on the electric vehicle,

the power receiving equipment includes a secondary-side resonance coil that receives power from the primary-side resonance coil, a rectifier that rectifies the power received by the secondary-side resonance coil, and an electrical storage device, to which the power rectified by the rectifier is supplied, and

a resonance system, which includes the primary-side resonance coil and the secondary-side resonance coil, in which the resonance system is configured such that impedance thereof is adjusted by the use of the vehicle height control device when the electrical storage device is being charged.

2. The resonance type non-contact power supply system for a vehicle according to claim 1, comprising a matching unit that adjusts the impedance of the resonance system.

3. The resonance type non-contact power system for a vehicle according to claim 1, wherein

the power receiving equipment includes a distance detecting high-frequency power source and a distance detecting section, and

the distance detecting section detects the distance between the secondary-side resonance coil and the primary-side resonance coil based on the input impedance of the resonance system in a state where the distance detecting high-frequency power source outputs high-frequency power.

4. The resonance type non-contact power system for a vehicle according to claim 1, wherein

the power receiving equipment includes a control device that adjusts the matching unit, and

the control device is configured to adjust the matching unit during charging of the electrical storage device based on data representing the relationship between the charge state of the electrical storage device and an adequate impedance of the matching unit that corresponds to the charge state.

5. An electric vehicle for use with an alternating-current power source provided in non-contact power supply equipment via a primary-side resonance coil, the electric vehicle comprising power receiving equipment and a vehicle height control device, wherein

the power receiving equipment is configured to receive power supplied from the alternating-current power source provided in the non-contact power supply equipment via the primary-side resonance coil,

the power receiving equipment includes:

a secondary-side resonance coil that receives power from the primary-side resonance coil, a rectifier that rectifies the power received by the secondary-side resonance coil, and an electrical storage device, to which the power rectified by the rectifier is supplied, and

a resonance system, which includes the primary-side resonance coil and the secondary-side resonance coil, in which the resonance system is configured such that impedance thereof is adjusted by the use of the vehicle height control device when the electrical storage device is being charged.

6. The electric vehicle according to claim 5, wherein

the power receiving equipment includes a distance detecting high-frequency power source and a distance detecting section, and

the distance detecting section detects the distance between the secondary-side resonance coil and the primary-side resonance coil based on the input impedance of the resonance system in a state where the distance detecting high-frequency power source outputs high-frequency power.

7. The electric vehicle according to claim 5, wherein

the power receiving equipment includes a control device that adjusts the matching unit, and

the control device adjusts the matching unit during charging of the electrical storage device based on data representing the relationship between the charge state of the electrical storage device and an adequate impedance of the matching unit that corresponds to the charge state.