POWER-FEEDING DEVICE

• US 20160276872A1
• Filed: 03/20/2014
• Published: 09/22/2016
• 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
• Granted Patent: US 9,973,040 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 that supplies power to an external power receiving section in a wireless manner, the power supply apparatus comprising:

a power supply coil that supplies power to a power receiving coil of the power receiving section using an electromagnetic force; and

a control section that controls an amount of power supply based on an amount of displacement of the power supply coil when power is supplied from the power supply coil.

2. The power supply apparatus according to claim 1, wherein, when the amount of displacement is equal to or greater than a threshold, the control section reduces the amount of power supply compared to a case where the amount of displacement is less than the threshold.

3. The power supply apparatus according to claim 1, wherein, when the amount of displacement is equal to or greater than a threshold, the control section sets the amount of power supply to “

zero.”

4. The power supply apparatus according to claim 1, wherein, when the amount of displacement is equal to or greater than a first threshold, the control section reduces the amount of power supply to a predetermined amount of power supply compared to a case where the amount of displacement is less than the first threshold, the predetermined amount being greater than zero, and the control section reduces the amount of power supply to “

zero”

when the amount of displacement is equal to or greater than a second threshold which is greater than the first threshold.

5. The power supply apparatus according to claim 1, further comprising a detection section that detects a displacement of the power supply coil, wherein the control section calculates the amount of displacement from an accumulation of the displacements detected by the detection section for a predetermined time.

6. The power supply apparatus according to claim 5, wherein the detection section detects acceleration of the power supply coil as the displacement.

7. The power supply apparatus according to claim 5, wherein the detection section detects an angular velocity of the power supply coil as the displacement.