Power-feeding device

• US 10,766,373 B2
• Filed: 06/28/2019
• Issued: 09/08/2020
• Est. Priority Date: 03/22/2013
• Status: Active Grant

• Current Assignee: Panasonic Automotive Systems Company of America (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: Nishio, Tsuyoshi, Ohashi, Osamu, Asaoka, Noriaki, Koizumi, Masayoshi
• Primary Examiner(s): Borroto, Alfonso Perez
• Assistant Examiner(s): Yeshaw, Esayas G
• Application Number:
  US16/456,911
• Publication Number:
  US 20190319497A1
• Time in Patent Office: 438 Days
• Field of Search: None
• 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 53/38 specially adapted for charging by inductive energy transfer
• CPC Class Codes: H02J 50/10 using inductive coupling
• 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 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: 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

To minimize excessively high output or increases in magnetic-flux leakage by controlling power feeding on the power-feeding side if an unforeseen situation occurs. This power-feeding device (100) feeds power to an external power-receiving device (150) in a contactless manner. A power-feeding coil (103) uses electromagnetic power to feed electrical power to a power-receiving coil (154) in the power-receiving device (150). While power is being fed from said power-feeding coil (103), a power-feeding-side control unit (107) determines the amount of displacement of the power-feeding coil (103) and, on the basis of the determined displacement amount, controls the amount of electrical power being fed.

Claims

1. A power supply apparatus comprising:

a power supply coil that supplies power to a power receiving coil of a power receiving section in a wireless manner using an electromagnetic force;

a controller that controls an amount of power supply that changes a magnetic coupling between the power supply coil and the power receiving coil based on an amount of displacement of a positional change of the power supply coil with respect to the power receiving coil when power is supplied from the power supply coil; and

a detection section that detects the displacement of the positional change of the power supply coil,

wherein the controller calculates the amount of displacement from an accumulation of the displacement of the positional change of the power supply coil detected by the detection section for a predetermined time, and when the amount of displacement during power supplying from the power supply coil is equal to or greater than a threshold, the controller reduces the amount of power supply to a lower amount than a case where the amount of displacement during power supplying from the power supply coil is lower than the threshold.

2. The power supply apparatus according to claim 1,

wherein the controller is an acceleration sensor.

3. The power supply apparatus according to claim 1,

wherein the controller is an angular velocity sensor.

4. The power supply apparatus according to claim 1,

wherein the displacement of the positional change of the power supply coil occurs by an earthquake.

5. The power supply apparatus according to claim 1,

wherein the power supply apparatus is installed on a ground.

6. A wireless power supply system that comprises:

the power supply apparatus of claim 1; and

a power receiving apparatus that comprises the power receiving section.

7. The wireless power supply system according to claim 6,

wherein the power supply coil is mounted on a vehicle.