Non-contact charging device

• US 9,050,900 B2
• Filed: 11/16/2011
• Issued: 06/09/2015
• Est. Priority Date: 12/27/2010
• Status: Active Grant

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Kai, Toshihiro, Throngnumchai, Kraisorn
• Primary Examiner(s): Parihar, Suchin
• Application Number:
  US13/976,169
• Publication Number:
  US 20130278212A1
• Time in Patent Office: 1,301 Days
• Field of Search: 320/108
• US Class Current: 1/1
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/622 by satellite navigation
• CPC Class Codes: B60L 2240/80 Time limits
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 2270/147 electro magnetic [EMI]
• 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: B60L 53/36 by positioning the vehicle
• CPC Class Codes: B60L 53/38 specially adapted for charging by inductive energy transfer
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: B60L 58/15 Preventing overcharging
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• 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 50/90 involving detection or optimisation of position, e.g. alignment
• 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 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
• CPC Class Codes: Y02T 90/16 : Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: Y02T 90/167 : Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: Y04S 30/14 : Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

A non-contact charging device includes a power receiving device having at least a power receiving coil 1B which receives electric power from a power transmitting coil 1A in a non-contact manner by magnetic coupling; a battery 5 which is charged by the electric power; a state-of-charge detection unit for detecting the state of charge of the battery 5; and a permissible charging range setting unit for setting a permissible charging range indicating the range of the position of the power transmitting coil 1A relative to the position of the power receiving coil 1B, in which the charging of the battery 5 is permitted, according to the state of charge detected by the state-of-charge detection unit.

Claims

1. A non-contact charging device comprising:

a power receiving device having at least a power receiving coil which receives electric power from a power transmitting coil in a non-contact manner by magnetic coupling;

a battery which is charged by the electric power;

a state-of-charge detection unit for detecting the state of charge of the battery;

a permissible charging range setting unit for setting a permissible charging range indicating the range of the position of the power transmitting coil relative to the position of the power receiving coil, in which the charging of the battery is permitted, according to the state of charge detected by the state-of-charge detection unit; and

a charge control unit for controlling charging power for the battery according to the state of charge detected by the state-of-charge detection unit,

wherein the permissible charging range setting unit sets the permissible charging range wider as the state of charge is higher.

2. The non-contact charging device according to claim 1, wherein

the charge control unit charges the battery by the electric power received by the power receiving coil, which is determined by displacement of the position of the power receiving coil relative to the position of the power transmitting coil, and limits the charging power by reducing the charging power as the state of charge becomes higher.

3. The non-contact charging device according to claim 1, comprising:

a temperature detection unit for detecting a temperature of the battery or a temperature in a vehicle having the power receiving device,

wherein the permissible charging range setting unit sets the permissible charging range according to the temperature detected by the temperature detection unit.

4. The non-contact charging device according to claim 1, further comprising:

a position detection unit for detecting the position of the power transmitting coil;

a determination unit for determining whether or not the charging of the battery is permitted; and

a determination result notification unit for providing notification of results determined by the determination unit,

wherein the determination unit determines that the charging of the battery is permitted, when the position of the power transmitting coil detected by the position detection unit lies Within the permissible charging range.

5. The non-contact charging device according to claim 1, further comprising:

a position detection unit for detecting the position of the power transmitting coil; and

a charging time calculation unit for calculating a first charging time for the battery according to the state of charge detected by the state-of-charge detection unit, and a first position of the power transmitting coil detected by the position detection unit.

6. The non-contact charging device according to claim 1, wherein

the charge control unit reduces the charging power in a stepwise fashion as the state of charge becomes higher.