Power receiving device, power transmitting device, and vehicle

• US 10,029,576 B2
• Filed: 08/18/2014
• Issued: 07/24/2018
• Est. Priority Date: 09/11/2013
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Yuasa, Hiroaki
• Primary Examiner(s): Tran, Thienvu
• Assistant Examiner(s): Stables, David M
• Application Number:
  US14/462,008
• Publication Number:
  US 20150069833A1
• Time in Patent Office: 1,436 Days
• Field of Search: None
• 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 53/38 specially adapted for charging by inductive energy transfer
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• 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 power receiving device includes a power receiving coil formed to surround space around a coil central axis extending in a front-back direction of a vehicle body, for receiving electric power from a power transmitting coil in a non-contact manner while facing the power transmitting coil, a capacitor arranged adjacent to the power receiving coil in the direction in which the coil central axis extends, and a shield arranged between the power receiving coil and the capacitor. The effect on the capacitor during electric power transmission can be reduced.

Claims

1. A power receiving device arranged on a bottom surface of a vehicle body, comprising:

a power receiving coil formed to surround space around a coil central axis extending in a front-back direction of the vehicle body, for receiving electric power from a power transmitting coil in a non-contact manner while facing the power transmitting coil;

a capacitor arranged adjacent to the power receiving coil in the direction in which the coil central axis extends;

a shield arranged between the power receiving coil and the capacitor, the shield including;

a wall portion positioned between the power receiving coil and the capacitor, and

a fixing portion for fixing the wall portion to a housing containing the power receiving coil; and

a fastening tool fixing the power receiving coil to the housing;

wherein a width dimension of the fixing portion in a width direction of the vehicle body is larger than a width dimension of the power receiving coil in the width direction of the vehicle body, and the fixing portion is fixed to the housing by the fastening tool.

2. The power receiving device according to claim 1, further comprising:

a core around which the power receiving coil is wound;

wherein, in the direction in which the coil central axis extends, a length between the shield and the core is longer than a length between the shield and the capacitor.

3. A power receiving device arranged on a bottom surface of a vehicle body, comprising:

a power receiving coil formed to surround space around a coil central axis extending in a front-back direction of the vehicle body, for receiving electric power from a power transmitting coil in a non-contact manner while facing the power transmitting coil;

a capacitor arranged adjacent to the power receiving coil in the direction in which the coil central axis extends;

a shield arranged between the power receiving coil and the capacitor; and

a core around which the power receiving coil is wound;

wherein, in the direction in which the coil central axis extends, a length between the shield and the core is longer than a length between the shield and the capacitor.

4. A vehicle comprising:

an engine provided in front of a center position in a front-back direction of a vehicle body; and

the power receiving device according to claim 3,

wherein, in the front-back direction of the vehicle body, the power receiving device is arranged behind the engine and in front of the center position.

5. The vehicle according to claim 4, further comprising a catalyst connected to the engine, wherein

in the front-back direction of the vehicle body, the power receiving coil is arranged behind the catalyst, and

in the front-back direction of the vehicle body, the capacitor is arranged behind the power receiving coil.