Resonance type non-contact charging device

• US 8,212,520 B2
• Filed: 12/24/2009
• Issued: 07/03/2012
• Est. Priority Date: 12/24/2008
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toyota Jidoshokki, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Suzuki, Sadanori, Yamamoto, Yukihiro, Ichikawa, Shinji, Takada, Kazuyoshi, Nakata, Kenichi, Sakoda, Shimpei, Ishikawa, Tetsuhiro
• Primary Examiner(s): Muralidar, Richard V
• Application Number:
  US13/132,240
• Publication Number:
  US 20120062172A1
• Time in Patent Office: 922 Days
• Field of Search: 320/108, 191/10, 180/65.21, 180/65.27, 180/65.29, 180/65.31, 455/41.1, 903/907
• 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: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H01M 10/46 Accumulators structurally combined with charging apparatus circuits for charging H02J7/00
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• 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 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• 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 charging device includes a high frequency power source, a primary side resonant coil, a secondary side resonant coil, a charger, a secondary battery, and a stop control unit. The primary side resonant coil receives supply of high frequency electric power from the high frequency power source. The secondary side resonant coil is arranged apart from the primary side resonant coil in a non-contact manner. The secondary side resonant coil receives electric power from the primary side resonant coil through magnetic field resonance between the primary side resonant coil and the secondary side resonant coil. The charger receives supply of high frequency electric power from the secondary side resonant coil. The secondary battery is connected to the charger. The stop control unit stops the high frequency power source before stopping the charger when charging is to be stopped.

Claims

1. A resonance type non-contact charging device comprising:

a high frequency power source,

a primary side resonant coil receiving supply of high frequency electric power from said high frequency power source,

a secondary side resonant coil arranged apart from said primary side resonant coil in a non-contact manner, receiving electric power from the primary side resonant coil through magnetic field resonance between said primary side resonant coil and secondary side resonant coil,

a charger receiving supply of high frequency electric power from said secondary side resonant coil,

a secondary battery connected to said charger, and

a stop control unit stopping said high frequency power source before said charger is stopped when charging is to be stopped.

2. The device according to claim 1, wherein

said high frequency power source and said primary side resonant coil are installed at a ground side, and

said secondary side resonant coil, said charger, and said secondary battery are mounted on said vehicle.

3. The device according to claim 1, wherein

said stop control unit includes a primary side control unit activating and stopping said high frequency power source, and a secondary side control unit activating and stopping said charger,

said primary side control unit and said secondary side control unit cooperate with each other to stop said high frequency power source before said charger is stopped.

4. The device according to claim 3, wherein

when charging is to be stopped,

said secondary side control unit notifies said primary side control unit that charging is to be stopped, and stops said charger at an elapse of a predetermined delay time,

said primary side control unit stops said high frequency power source when receiving notification of stopping charging from said secondary side control unit.

5. The device according to claim 3, wherein said primary side control unit and said secondary side control unit are capable of communication with each other wirelessly.

6. The device according to claim 2, wherein

said stop control unit includes a primary side control unit activating and stopping said high frequency power source, and a secondary side control unit activating and stopping said charger,

said primary side control unit and said secondary side control unit cooperate with each other to stop said high frequency power source before said charger is stopped.

7. The device according to claim 6, wherein

when charging is to be stopped,

said secondary side control unit notifies said primary side control unit that charging is to be stopped, and stops said charger at an elapse of a predetermined delay time,

said primary side control unit stops said high frequency power source when receiving notification of stopping charging from said secondary side control unit.

8. The device according to claim 4, wherein said primary side control unit and said secondary side control unit are capable of communication with each other wirelessly.

9. The device according to claim 6, wherein said primary side control unit and said secondary side control unit are capable of communication with each other wirelessly.

10. The device according to claim 7, wherein said primary side control unit and said secondary side control unit are capable of communication with each other wirelessly.