Power reception apparatus and power receiving method

• US 9,831,681 B2
• Filed: 10/15/2012
• Issued: 11/28/2017
• Est. Priority Date: 04/30/2010
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Shimokawa, Satoshi
• Primary Examiner(s): Pelton, Nathaniel
• Assistant Examiner(s): Bui, Dung V
• Application Number:
  US13/651,831
• Publication Number:
  US 20130038282A1
• Time in Patent Office: 1,870 Days
• Field of Search: 320108
• 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 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 53/36 by positioning the vehicle
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• 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 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• 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 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

A power reception apparatus includes a plurality of power extraction coils that extract power from a coil being a power supply source, a switch that selects one of the plurality of the power extraction coils and connects the selected power extraction coil to a battery, and a controller that senses a charging state of the battery and changes over the switch. The plurality of the power extraction coils are different from each other in terms of a diameter, the number of turns, or a distance from the coil being the power supply source.

Claims

1. A power reception apparatus comprising:

a power extraction coil that extracts power from a coil being a power supply source and charges a battery;

a controller that senses a charging state of the battery and controls a position control mechanism; and

the position control mechanism that moves the power extraction coil based on a load impedance obtained from the charging state of the battery thereby changing the position of the power extraction coil.

2. The power reception apparatus according to claim 1, wherein the coil being the power supply source is installed in an inner portion of the power reception apparatus, and the coil being the power supply source receives power from a coil outside the power reception apparatus using magnetic field resonance.

3. The power reception apparatus according to claim 1, wherein the charging state of the battery includes a supply voltage, a current, and a remaining amount of the battery.