Wireless Power Charging System

• US 20090267558A1
• Filed: 06/26/2008
• Published: 10/29/2009
• Est. Priority Date: 04/28/2008
• Status: Active Grant

• Current Assignee: GE Hybrid Technologies, LLC
• Original Assignee: Spacon Co., Ltd.
• Inventors: Jung, Chun-Kil
• Granted Patent: US 8,115,449 B2
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 7/0047 with monitoring or indicating devices or circuits
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]

Abstract

A non-contact power charging system includes a wireless power transmission apparatus 10 for transmitting a power signal from a primary core 14 via a resonant converter 13 by the control of a transmission control unit 12; and a wireless power receiving apparatus 20 for receiving the power signal transmitted from the primary core 14 of the wireless power transmission apparatus 10 via a secondary core 24 and charging a battery cell 21 by the control of a receiving control unit 22. The wireless power receiving apparatus 20 includes a receiving shield panel 25 and an eddy current reducing member 26 in the side of the secondary core 24 to shield an electromagnetic field generated from the secondary core 24, to thereby protect the charging system and the battery pack from the electromagnetic field.

Claims

1. A wireless power charging system comprising:

a wireless power transmission apparatus for transmitting a power signal from a primary core via a resonant converter by the control of a transmission control unit; and

a wireless power receiving apparatus for receiving the power signal transmitted from the primary core of the wireless power transmission apparatus via a secondary core and charging a battery cell by the control of a receiving control unit,

wherein the wireless power receiving apparatus includes a receiving shield panel and an eddy current reducing member in the side of the secondary core to shield an electromagnetic field generated from the secondary core.

2. The wireless power charging system according to claim 1, wherein the receiving shield panel of the wireless power receiving apparatus comprises 25˜

35 parts by weight of polyurethane for every 65˜

75 parts by weight of sendust.

3. The wireless power charging system according to claim 1, wherein the eddy current reducing member of the wireless power receiving apparatus is made of net-shaped polyester plated with an eddy current reducing composition, wherein the eddy current reducing composition comprises 35˜

45 parts by weight of zinc for every 55˜

65 parts by weight of nickel.

4. The wireless power charging system according to claim 1, wherein the wireless power transmission apparatus comprises a transmission shield panel in the side of the primary core to shield the electromagnetic field generated from the primary core.

5. The wireless power charging system according to claim 4, wherein the transmission shield panel of the wireless power transmission apparatus is made of 35˜

45 parts by weight of polyurethane for every 55˜

65 parts by weight of sendust.

6. The wireless power charging system according to claim 1, wherein the wireless power transmission apparatus includes:

a power supply module for supplying electric power, such that the power signal is transmitted from the primary core;

a display unit for displaying an operation status of the wireless power transmission apparatus, an operation status of the wireless power receiving apparatus, and a charging status of the battery cell; and

a transmission memory unit, and wherein the transmission control unit includes;

a pre-driver for operating the resonant converter by the control of a main controller; and

a received signal process block for receiving a signal detected from the primary core and transmitting the detected signal to the main controller.