US 9,426,933 B2Granted

Resonance type non-contact power feeding system, power transmission side apparatus and in-vehicle charging apparatus of resonance type non-contact power feeding system

AssigneesYazaki Corporation, Toyota Jidosha Kabushiki Kaisha

InventorsYou Yanagida, Shinji Ichikawa, Satoru Horiuchi

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Abstract

A resonance type non-contact power feeding system 10 includes, as a power reception side (secondary side) apparatus, a load device 50, a secondary coil 40, a secondary resonance coil 45, and a rectifier 160. A battery 52 is provided inside a load housing 54 of the load device 50. In addition, like a power transmission side metal shield 80 on the power transmission side, the resonance type non-contact power feeding system 10 includes a power reception side metal shield 90 that covers the secondary coil 40 and the secondary resonance coil 45, and a rectifier shield 170 that covers the rectifier 160. Moreover, a power reception side large metal shield 130 that covers the outside of the power reception side metal shield 90 and the rectifier shield 170 is provided.

A resonance type non-contact power feeding system which transmits power from a power transmission side resonance coil portion to a power reception side resonance coil portion by a non-contact resonance action,

wherein a power transmission side apparatus including the power transmission side resonance coil portion includes:
a power transmission side coaxial cable which electrically connects a high-frequency power source to the power transmission side resonance coil portion;
a first power transmission side shielding unit covering the power transmission side resonance coil portion from outside with a good conductor;
and
a second power transmission side shielding unit covering the power transmission side coaxial cable and the first power transmission side shielding unit;
wherein an external conductor of the power transmission side coaxial cable, the first power transmission side shielding unit, a housing of the high-frequency power source, and the second power transmission side shielding unit are connected at the same potential;
and
wherein a power reception side apparatus including the power reception side resonance coil portion includes:
a first power reception side shielding unit covering the power reception side resonance coil portion from outside with a good conductor;
a second power reception side shielding unit covering a rectifier that rectifies alternating current generated in the power reception side resonance coil portion into direct current, from outside with a good conductor;
a third power reception side shielding unit covering the first power reception side shielding unit and the second power reception side shielding unit, and
an output line shielding unit covering, in output lines from the rectifier to a load device, the output line in a section from the third power reception side shielding unit to a housing of the load device;
and
wherein the first power reception side shielding unit, the second power reception side shielding unit, the third power reception side shielding unit, and the output line shielding unit are connected at the same potential.

11 more elements

Facts

Application

14/110,785Filed 20 Apr 2012

Priority

JP 2011-09636622 Apr 2011

Published

US 2014/0029233 A130 Jan 2014

Granted

23 Aug 2016

Term ends

Not estimatedThe source records don’t support an estimate.

Classification27 codes

B60L 53/30
Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of…:…
B60L 53/122
Inductive energy transfer: circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
H01F 27/346
Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations,…:…
H01F 27/363
Electric or magnetic shields or screens: made of electrically conductive material

Abstract

Claims5