Resonance-type non-contact power supply system, power-receiving-side device and power-transmission-side device

• US 9,299,492 B2
• Filed: 10/04/2013
• Issued: 03/29/2016
• Est. Priority Date: 04/22/2011
• Status: Active Grant

• Current Assignee: Yazaki Corporation
• Original Assignee: Yazaki Corporation
• Inventors: Nakahara, Takahiro, Yanagida, You, Ngahu, Antony
• Primary Examiner(s): DEBERADINIS, ROBERT L
• Application Number:
  US14/046,563
• Publication Number:
  US 20140042823A1
• Time in Patent Office: 907 Days
• Field of Search: 307/91, 307/104
• US Class Current: 1/1
• 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 53/30 Constructional details of charging stations
• CPC Class Codes: H01F 27/346 Preventing or reducing leakage fields using magnetic shields H01F27/36; using auxiliary windings H01F27/38
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01M 10/46 Accumulators structurally combined with charging apparatus circuits for charging H02J7/00
• 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: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• 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 power supply system includes a power-transmission-side metal shield to cover an area around a primary coil and a primary resonance coil, and a power-receiving-side metal shield to cover an area around a secondary coil and a secondary resonance coil, and when charging is performed, the power-transmission-side metal shield and the power-receiving-side metal shield are connected with a case connector to be at the same potential.

Claims

1. A power-transmission-side device used in a resonance-type non-contact power supply system, which transmits electric power by a non-contact resonance effect from a power-transmission-side resonance coil part connected to a high frequency power supply by a coaxial cable to a power-receiving-side resonance coil part, the power-transmission-side device comprising:

a power-transmission-side shield part which is a good conductor and covers from outside to accommodate the power-transmission-side resonance coil part, and which is electrically connected to a housing of the high frequency power supply by an outer conductor of the coaxial cable, and

a case connecting part which electrically connects the power-transmission-side shield part to a power-receiving-side shield part which is a good conductor and covers from outside to accommodate the power-receiving-side resonance coil part so that a positional deviation between the power-transmission-side shield part and the power-receiving-side shield part can be absorbed.

2. The power-transmission-side device according to claim 1, wherein the case connecting part is constructed to connect the power-transmission-side shield part and the power-receiving-side shield part when non-contact power supply is performed, and to be accommodated when the non-contact power supply is not performed.

3. A power-receiving-side device used in a resonance-type non-contact power supply system, which transmits electric power by a non-contact resonance effect from a power-transmission-side resonance coil part which is connected to a high frequency power supply to a power-receiving-side resonance coil part connected to a load device by a coaxial cable, the power-receiving-side device comprising:

a power-receiving-side shield part which is a good conductor and covers from outside to accommodate the power-receiving-side resonance coil part, and which is electrically connected to a housing of the load device by an outer conductor of the coaxial cable, and

a case connecting part which electrically connects the power-receiving-side shield part to a power-transmission-side shield part which is a good conductor and covers from outside to accommodate the power-transmission-side resonance coil part so that a positional deviation between the power-transmission-side shield part and the power-receiving-side shield part can be absorbed.

4. The power-receiving-side device according to claim 3, wherein the case connecting part is constructed to electrically connect the power-receiving-side shield part and the power-transmission-side shield part when non-contact power supply is performed, and to be accommodated when the non-contact power supply is not performed.

5. A resonance-type non-contact power supply system that transmits electric power by a non-contact resonance effect from a power-transmission-side resonance coil part, which is connected to a high frequency power supply by a first coaxial cable, to a power-receiving-side resonance coil part, which is connected to a load device by a second coaxial cable, the system comprising:

a power-transmission-side shield part which is a good conductor and covers from outside to accommodate the power-transmission-side resonance coil part, and which is electrically connected to a housing of the high frequency power supply by an outer conductor of the first coaxial cable;

a power-receiving-side shield part which is a good conductor and covers from outside to accommodate the power-receiving-side resonance coil part, and which is electrically connected to a housing of the load device by an outer conductor of the second coaxial cable, and

a case connecting part which electrically connects the power-transmission-side shield part and the power-receiving-side shield part so that a positional deviation between the power-transmission-side shield part and the power-receiving-side shield part can be absorbed.

6. The resonance-type non-contact power supply system according to claim 5, wherein the power-receiving-side shield part is provided with the case connecting part which is constructed to electrically connect the power-receiving-side shield part and the power-transmission-side shield part when non-contact power supply is performed, and to be accommodatable when the non-contact power supply is not performed.

7. The resonance-type non-contact power supply system according to claim 5, wherein the power-transmission-side shield part is provided with the case connecting part which is constructed to electrically connect the power-receiving-side shield part and the power-transmission-side shield part when non-contact power supply is performed, and to be accommodatable when the non-contact power supply is not performed.

8. The resonance-type non-contact power supply system according to claim 6, wherein the power-transmission-side shield part is provided with the case connecting part which is constructed to electrically connect the power-receiving-side shield part and the power-transmission-side shield part when non-contact power supply is performed, and to be accommodatable when the non-contact power supply is not performed.